BMW E90 M3 S65 4.0L

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Active Autowerke Performance Filter (Green Filter, Reusable With Clea...
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Active Autowerke - Corporate Logo
T#:638561
Part#: AAAIRFE9XM
Ships in 3 Business Days
5% off MSRP $ 119.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 113.00 USD
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5% off MSRP
$ 119.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 113.00 USD
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This allows your engine to breathe easily, making your powerplant more efficient. This filter utilizes two layers of tightly woven cotten fabric - cotton holds oil better, is thinner, and stronger.
Active Autowerke Power Pulley Kit - E9x M3
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For vehicles with production date 2007-5/2008
Active Autowerke - Corporate Logo
T#:397285
Part#: 13-001
Ships in 3 Business Days
5% off MSRP $ 399.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 379.99 USD
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5% off MSRP
$ 399.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 379.99 USD
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Easy to install - reduces parasitic losses from belt driven auxiliary components. Engine crankshaft pulley remains the same, this modification simply unleashes untapped potential from your vehicle. Expect to see gains around 10 RWHP from your S65. All BMW power pulleys included, including alternator, water pump, and power steering pulleys.
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Fall-Line Motorsports E9X M3 / E82 1M Adjustable Toe Arm Set - Standa...
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Fall Line - Corporate Logo
T#:28038216
Part#: FLM-E9X-1FECOTOE
In Stock at Vendor
$ 329.99 USD
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$ 329.99 USD
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A byproduct of multi-link suspension arrangements is a dynamic change in the car’s alignment settings- when making an adjustment to one attribute like camber, track width and toe will follow. This is especially true for the E9x cars, as the original BMW camber eccentric bolt has an impact on toe as well. Alignments are made faster and simpler when using a set of aftermarket lower arms, enabling the alignment tech to easily reset toe after adjusting camber. The standard toe link kit by Fall Line Motorsports is designed to simplify toe changes at an alignment facility while still keeping cost reasonable. The standard toe link kit keeps costs down by using a traditional jam nut design in a sturdy billet arm. Adjustable threaded rod ends turn into and out of the arm for a wide range of toe adjustment, and enable an alignment technician to easily set toe on a lowered car.
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Active Autowerke Rotrex Traction Fluid - One Liter
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Active Autowerke - Corporate Logo
T#:397307
Part#: 12-032
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$ 240.00 USD
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$ 240.00 USD
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Rotrex superchargers utilize a unique traction drive system that sets it apart from other centrifugal-style superchargers. For best performance, Rotrex recommends replacing this fluid every 50,000 miles. This bottle of traction fluid is plenty enough for one supercharger service (typically 750ml). 
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Fall-Line Motorsports Lower Coil Over Camber Arm & Shim Set - G8X / F...
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Fall Line - Corporate Logo
T#:20979735
Part#: F8X/E9X-1FLCOCA
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$ 995.00 USD
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$ 995.00 USD
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*NOTE: ONLY FOR CARS WITH TRUE REAR COIL OVER CONVERSION - NOT COMPATIBLE WITH STOCK REAR SPRINGS* Fall-Line Motorsports has taken everything they've learned in manufacturing over the last decade to create an ultra-high-end interpretation of the G8X / F8X M2 M3 M4 and E9X M3 lower camber arm. Fall-Line's bespoke version discards the deformation-prone stamped steel arm that includes a provision for the rear coil spring in favor of 5-axis CNC machined, billet aluminum that eliminates the rear coil mount. This pair has been gorgeously crafted and pocketed (to save weight without compromising rigidity) and is hard coat black anodized for ultimate resistance to wear. So too has the hardware been given an upgrade—10.9 grade corrosion-resistant extended bolts are included to replace the inferior factory pieces. These arms represent another exciting entry into the often neglected F8X / E9X suspension arm market and add valuable peace of mind for street or motorsport duty from the undisputed champion within the BMW realm. Product Details: For all G8X, F8X, and E9X M3 cars using TRUE Rear Coil Over Conversion ONLY DMG Mori 5-Axis CNC machined, billet aluminum construction Hard coat black anodized Includes Camber Shim Set Sold in pairs
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Fall-Line Motorsports E9X M3 / E82 1M Billet Aluminum Rear Trailing A...
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T#:28038203
Part#: FLM-E9X-1FRTAK
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$ 449.99 USD
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$ 449.99 USD
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Fall-Line Motorsports E9X / E36 M3 Tow Strap - Red
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Fall Line - Corporate Logo
T#:26038600
Part#: FLM-E9X-3TSTR
Ships in 2 Business Days
$ 139.99 USD
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$ 139.99 USD
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Ensure strength and durability for your BMW with the Fall Line Motorsports tow strap, designed specifically for BMW M cars. Crafted with 5-axis CNC machined stainless steel hardware and a CNC sewn strap, this tow strap offers unparalleled robustness to withstand repeated use. Installation is effortless, with each strap engineered to thread seamlessly into the M3’s bumper reinforcement. Made in the USA, the Fall Line Motorsports tow strap is the highest quality choice for BMW M enthusiasts.

Benefits:

  • High-quality tow strap designed for BMW M cars
  • Crafted with 5-axis CNC machined stainless steel hardware
  • CNC sewn strap for unparalleled robustness
  • Effortless installation into the M3’s bumper reinforcement
  • Made in the USA
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Rear Lower Control Arm Bearing Set - Outer - E9X M3/E82 1M
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Fall Line - Corporate Logo
T#:5580972
Part#: FLM-E9X-1BLCABO
Ships in 3 Business Days
$ 329.99 USD
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$ 329.99 USD
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Rubber bushings found in the latest M Cars' rear camber arms are the last weak link in an otherwise rigid suspension. Fall-Line's new lower control arm bearings yield a significant improvement over the factory bushings; as motorsport parts, both strength and longevity were priorities—to do just that, Fall-Line boasts the largest FK spherical bearings on the market—by eliminating rubber from a critical feedback area of the car, you gain control over the tire’s behavior and thereby confidence behind the wheel at the limit. To adequately cope with competition-level load, Fall-Line bearings feature stainless steel spiral locks that offer 360 degrees of clamping force to secure the bearing from any potential movement.
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Rear Lower Control Arm Cup Subframe Bearing Set - E9X M3/E82 1M ...
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T#:5580971
Part#: F8X-1BLCASB
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$ 419.99 USD
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$ 419.99 USD
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Rubber bushings found in the latest M Cars' rear camber arms are the last weak link in an otherwise rigid suspension. Fall-Line's new lower control arm subframe cup bearings yield a significant improvement over the factory bushings; as motorsport parts, both strength and longevity were priorities—to do just that, Fall-Line boasts the largest FK spherical bearings on the market—by eliminating rubber from a critical feedback area of the car, you gain control over the tire’s behavior and thereby confidence behind the wheel at the limit. To adequately cope with the competition-level load, Fall-Line bearings feature stainless steel spiral locks that offer 360 degrees of clamping force to secure the bearing from any potential movement.
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Rear Sway Bar End Link Kit - E9X M3/E82 1M
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Fall Line - Corporate Logo
T#:5580964
Part#: E9X-1BRLINK
In Stock
$ 280.00 USD
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$ 280.00 USD
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Adjustable sway bar end links are an absolutely critical component for anyone who is serious about extracting the best possible handling from their M car. By varying the length of each link slightly, the alignment technician can ensure that the sway bar is completely unloaded and unstressed at static ride height, giving the car excellent chassis dynamics and truly even corner balance.
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Fall-Line Motorsports - Aluminum DCT Hydraulics Cover - Multiple BMW ...
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T#:5498480
Part#: FLM-DCT-HC
In Stock
$ 899.99

This product was last offered at the strikethrough price on
06-01-2026

$ 845.99 USD
Limited Qty Sale
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$ 899.99

This product was last offered at the strikethrough price on
06-01-2026

$ 845.99 USD
Limited Qty Sale
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Like the DCT oil pan, the plastic OEM hydraulics cover is prone to fatiguing from heat cycling; not ideal considering the important parts that reside behind it. And also like it's oil pan sibling, the Fall-Line hydraulics cover uses a bespoke Viton O-Ring that resides within a clever internal channel. Viton O-Rings, due to their exceptional resistance to temperature extremes (-20°F to 400°F operating temp) and low gas permeability, have incredible aging characteristics and therefore eliminate the need for regular replacement.
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Active Autowerke Signature Trunk Emblem
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T#:590914
Part#: AASIGNATUREPLAQU
Ships in 3 Business Days
4% off MSRP $ 45.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 43.00 USD
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4% off MSRP
$ 45.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 43.00 USD
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Stand out from the crowd, and give them a hint of what you've got going on under the hood, with the official Active Autowerke Signature Emblem! The emblem can be placed anywhere on the exterior, or interior of your BMW. Hefty stainless steel construction and durable double-sided tape will help ensure that it is never lost, even at speeds over 170+ MPH...Don't ask us how we know! Represent your favorite BMW tuner for all to see today!
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Active Autowerke Signature Exhaust Generation 2 - E90/E92 M3 ...
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Active Autowerke - Corporate Logo
T#:397446
Part#: 11-015
Ships in 3 Business Days
$ 1,519.99 USD
$ 1,519.99 USD

True performance, durability, and attractive weight advantages with innovative features places the Active Autowerke E9X BMW M3 exhaust in a class of its own. This system is constructed from 100% 304-stainless steel and features adjustable Active Autowerke double walled tips, making it ideal both for 2-door and 4-door models (also allows for cleaner fitment with diffusers).

This system uses factory style flanges making it a complete bolt on system that requires no cutting or welding. The system is a straight-through design providing substantial improvements to gas flow over the factory exhaust.

The sound is unobtrusive, with a rich mellow tone and delivers a solid 5+hp, with key gains in the mid-range. In addition, the Active Autowerke E9X M3 Signature Exhaust system features large 3" piping for maximum exhaust flow while maintaining enough back-pressure to result in horsepower increases across the entire RPM range.

The factory E9X M3 muffler features a Noise Canceling Chamber inside the muffler and Active Autowerke has retained this feature by adding two custom Active Autowerke noise canceling chambers (NCC)on each muffler to reduce/minimize the drone (the 'booming' noise some muffler emit at cruising speeds, ~3500 rpm).

The Active Autowerke E9X M3 Signature Exhaust System provides increase in horsepower, great sound and appearance making it a must for the true M3 enthusiasts.


Features:

  • Large 3-inch mandrel bent piping for maximum flow 
  • Durable, 100% 304 brushed stainless steel 
  • Double-walled 76mm Signature stainless tips
  • Revolutionary NCC -Noise Cancelling Chamber 
  • Adjustable Tips with Embossed Active Autowerke Logo
  • Improved power & torque throughout entire RPM band 
  • Gains of 5+ HP over stock configuration; Additional HP with our programmed software 
  • BMW factory style hardware makes a truly easy installation with no need for cutting or re-welding 
  • Weighs 40 Lbs vs. the factory of 55.1 Lbs.
  • Complete illustrated instruction manual
  • Two year warranty
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Fall-Line Motorsports E9X M3 / E82 1M Rear Sway Bar End Link Kit - V2...
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Fall Line - Corporate Logo
T#:28038220
Part#: FLM-E9X-1BRLINK
Ships in 3 Business Days
$ 198.00 USD
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$ 198.00 USD
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Lowering your car is often the first step in suspension tuning, but occasionally, this process can adversely affect other associated components. Unwanted sway bar pre-load may be one of these consequential effects, adding asymmetrical spring rate bias to one side of the car versus the other. This imbalance may affect your overall chassis dynamics and corner balance. For this reason, adjustable sway bar end links are critical—by adjusting each link with the car at operating weight, you can ensure the sway bar is completely unloaded at your determined ride height, restoring your chassis' balance and your confidence in all driving situations. Unlike all other link kits on the market that utilize the cheaper and simpler jam-nuts, Fall-Line utilizes OE tie-rod end style pinch-nut fasteners to ensure they never lose their set length. NOTE: New V2 photos coming soon! V2 Key Features: Now includes OE tie-rod end style pinch-nut fastener rod ends Eliminates the typical jam-nut rod ends that are known to move over time Designed for superior corner balancing Ensures equal weight distribution on each tire Compatible with height adjustable dampers Eliminates uneven cross-weights Prevents sway bar-induced suspension stress Allows for precise customization through length variation Includes dust boots to protect against dust interference Made in USA Sold as a pair
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BMW E9X M3/E82 1M Inner Lower Tension Arm Bearing
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Fall Line - Corporate Logo
T#:5580975
Part#: FLM-E9X-1BLTABI
Ships in 3 Business Days
$ 329.99 USD
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$ 329.99 USD
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BMW E9X M3/E82 1M Inner Lower Tension Arm Bearing is engineered to elevate suspension performance with precision and durability. Developed by Fall-Line, known for their championship-level race cars and premium suspension components, this bearing is a significant upgrade over factory rubber bushings. Designed for motorsport applications, it incorporates FK spherical bearings for enhanced strength and longevity.

  • Superior Performance: Provides a notable improvement over OEM rubber bushings for enhanced control and feedback.
  • Durable Construction: Features the largest FK spherical bearings available, ensuring long-lasting reliability.
  • Enhanced Control: Eliminates rubber components to offer better control over tire behavior and increased driver confidence.
  • Robust Design: Equipped with stainless steel spiral locks for 360 degrees of clamping force to secure the bearing firmly.
  • Long-Lasting: Outperforms OEM rubber variants, reducing the need for frequent replacements.
  • Precision Engineering: CNC machined from high-quality materials in the USA for exact fit and superior performance.
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Active Autowerke Supercharger Kit - E9X M3 2008-2013
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Active Autowerke - Corporate Logo
T#:340094
Part#: AASC-E9XM3
Ships in 10 Business Days
Starting at $ 9,995.00 USD
Starting at $ 9,995.00 USD
The advanced design and sleek features of the Active Autowerke Supercharger System include a front mount air-to-air intercooler system with a separate oil cooler for the supercharger unit's independent oil system. The Active Autowerke Supercharger Plenum replaces the factory air box and is designed to have an OEM-type look with custom finishes available at the customer's request. The Active Autowerke Supercharger Plenum has been designed with eight high-flow velocity stacks, and large three-inch intercooler piping to supply cooled air.
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Lower Tension Arm Bearing - Outer - E9X M3/E82 1M
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Fall Line - Corporate Logo
T#:5580979
Part#: FLM-E9X-1BLTABO
Ships in 3 Business Days
$ 329.99 USD
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$ 329.99 USD
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By eliminating rubber from a critical feedback area of the car, you gain control over the tire’s behavior and thereby confidence behind the wheel at the limit. To adequately cope with competition-level load, Fall-Line bearings feature stainless steel spiral locks that offer 360 degrees of clamping force to secure the bearing from any potential movement.
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Active Autowerke Thermostat Bypass/Delete Tube - S65
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Active Autowerke - Corporate Logo
T#:2302749
Part#: 14-016
Ships in 10 Business Days
$ 141.99 USD
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$ 141.99 USD
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CNC machined coolant/water thermostat bypass tube to improve flow on and off the track. Easy plug and play installation and a durable anodized coating make this a simple and reliable temperature control solution.
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Fall-Line Motorsports E9X M3 / E82 1M Adjustable Toe Arm Set - Race ...
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Fall Line - Corporate Logo
T#:28071501
Part#: FLM-E9X-1FRACTOE
Back Ordered
$ 650.00 USD
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$ 650.00 USD
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A byproduct of multi-link suspension arrangements is a dynamic change in the car’s alignment settings- when making an adjustment to one attribute like camber, track width and toe will follow. This is especially true for the E9x cars, as the original BMW camber eccentric bolt has an impact on toe as well. Alignments are made faster and simpler when using a set of aftermarket lower arms, enabling the alignment tech to easily reset toe after adjusting camber. The race toe link kit by Fall Line Motorsports is designed to facilitate rapid adjustments of toe during an alignment, and combined with the tension strut will also enable adjustment of overall track. Not only does this allow for fine tuning of wheel fitment, these arms will allow an alignment shop to make quick work of car setup, even simplifying the camber adjustment process as a result. The race toe links utilize a unique clamp-style fastener system as seen in BMW’s own tie rods and Porsche Motorsport components, tightening the adjustment arm in place with no stretch of the hardware or change of alignment. Less expensive jam-nut designs limit precision and nearly guarantee an alignment change when the jam-nut is tightened. Laser cut lockout washers correctly eliminate the original BMW adjustment, eliminating any unwanted movement in the system.
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Fall-Line Motorsports - Ultimate DCT Track Package - Multiple BMW Fit...
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T#:5498483
Part#: FLM-DCT-PKG
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$ 1,999.00 USD
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$ 1,999.00 USD
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The Ultimate DCT Track Package. Period! Fall-Line has designed an incredible 6061-T6 aluminum oil pan and matching hydraulics cover for DCT cars. The plastic OEM parts are prone to failure from heat-cycling and use a brittle gasket that requires replacement over time. The Fall-Line parts use a bespoke Viton O-Ring that resides within a clever internal channel. Viton O-Rings, due to their exceptional resistance to temperature extremes (-20°F to 400°F operating temp) and low gas permeability, have incredible aging characteristics and therefore eliminate the need for regular replacement.
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Fall-Line Motorsports - Aluminum DCT Oil Pan - Multiple BMW Fitments ...
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T#:5498479
Part#: FLM-DCT-PAN
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$ 899.00 USD
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$ 899.00 USD
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The plastic OEM pan is prone to leaking and uses a brittle gasket that requires replacement over time. The Fall-Line pan uses a bespoke Viton O-Ring that resides within a clever internal channel. Viton O-Rings, due to their exceptional resistance to temperature extremes (-20°F to 400°F operating temp) and low gas permeability, have incredible aging characteristics and therefore eliminate the need for regular replacement.
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Fall-Line Motorsport E9X M3 / E82 1M Motorsport Hub Retrofit Kit ...
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Fall Line - Corporate Logo
T#:28038193
Part#: FLM-E9XM-1BHUB
Ships in 3 Business Days
$ 1,695.00 USD
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$ 1,695.00 USD
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*MADE TO ORDER; ALLOW 2-3 BUSINESS DAYS* The E9X M3 / E82 1M have unquestionably become modern-day icons for their formidable street and track dominance. Both of these cars are equipped with M12x1.5 hardware from the factory, leaving them precariously prone to failure during rigorous track sessions and consequently, a potentially dangerous and damaging fate. Fall-Line Motorsport has developed a hub retrofit kit that will convert your E9X M3 / E82 1M to the more robust M14x1.25 hardware as well as shave rotational mass from each corner. OE M12x1.5 Front Hub Assembly: 3293g FLM M14x1.25 Front Hub Assembly: 2957g (-0.74lbs per corner) OE M12x1.5 Rear Hub Spindle: 1686g FLM M14x1.25 Rear Hub Spindle: 1441g (-0.54lbs per corner) Each hub kit comes pre-assembled, moly-coated, and includes everything you'll need for a truly plug and play retrofit*, including all new hardware. NOTE: *OEM rotor hats and select aftermarket solutions may require drilling out rotor hats to accommodate M14 hardware. Please also verify your desired wheel set can accept M14. Stud Kit pictured is sold separately. What is moly coating? Molybdenum Disulfide Coatings (MoS2 coatings), also known as Moly Coatings, are a dry film lubricant that are commonly used in applications where load carrying capacity, operating pressure and coefficient of friction are primary concerns. This coating provides effective lubrication in a wide range of loads, in many cases exceeding 250,000 psi. Moly coatings lubricate sacrificially by transferring lubricant between the two mating surfaces, which helps to reduce wear and coefficient of friction.
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Fall-Line Motorsports E9X M3 / E82 1M Front Mono Ball Conversion Kit ...
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Fall Line - Corporate Logo
T#:28038194
Part#: FLM-E9X-1BUNI
Ships in 3 Business Days
$ 423.00 USD
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$ 423.00 USD
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Fall Line’s mono ball spherical bearing conversion kit transforms the front steering and suspension feel of the M3. The factory rubber bushing is very large, and is prone to substantial deflection under load, as the M3 is put through its paces. Deflection of the bushing can create unwanted geometry change, steering wobble under braking, and even hysteresis of the thrust arm. The bearing’s housing is precision machine from aluminum, to create a rigid part that allows for the M3’s thrust arm to move smoothly through its range of suspension travel. The improvement in steering and suspension feel is immediate and truly enhances the personality of the M3. *V2 improved design also incorporates hard coat clear anodized finish*
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Fall-Line Motorsports E9X / E36 M3 Tow Strap - Black
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Fall Line - Corporate Logo
T#:31622549
Part#: FLM-E9X-3TSTR-BL
Ships in 3 Business Days
$ 147.99 USD
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$ 147.99 USD
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Fall-Line Motorsports E90 M3 Bolt-In Harness Bar
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Fall Line - Corporate Logo
T#:28071518
Part#: FLM-E90-RB-G
Ships in 3 Business Days
$ 4,195.00 USD
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$ 4,195.00 USD
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SPECIAL ORDER. MADE IN THE USA. Fall Line Motorsports has earned their reputation as one of the premier BMW race car manufacturers by investing over one and a half decades of dedication and hard work. The experience housed within Fall Line’s facility walls is a nearly universal collection of racing knowledge, encompassing everything from suspension design and engineering to engine design, to world-class safety systems. Each bar is manufactured from mandrel bent chromoly steel with an .083” wall thickness. Product Details: 1.75" x .083" wall chromoly tubing tig-welded GT3 style CNC machined lightweight gussets available as optional add-on Optional rear closeout set for those looking to delete their rear seat Please contact us for custom finish options DISCLAIMER: may not comply with all race sanctioning bodies and technical regulations
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Active Autowerke Generation 2 Level 2 Supercharger Kit - E90,E92,E93 ...
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Active Autowerke - Corporate Logo
T#:397304
Part#: 12-029
Ships in 10 Business Days
5% off MSRP $ 16,249.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 15,436.99 USD
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5% off MSRP
$ 16,249.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 15,436.99 USD
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Since getting their start in 1981, Active Autowerke has earned a well-respected reputation in the BMW community for engineering high-quality power solutions for popular BMW models. This supercharger kit will produce 640 horsepower and 413 ft.lbs. of torque on your BMW, while retaining platform integrity and daily driveability. Unique to the design of the Rotrex supercharger is the traction drive system, which eliminates the lag often found in other centrifugal supercharger setups. Power delivery is smooth and dependable, and 100% reversible to stock if you so choose, since each system is designed as a self-contained unit.
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Active Autowerke Generation 2 Level 3 Supercharger Kit - E90,E92,E93 ...
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Active Autowerke - Corporate Logo
T#:397305
Part#: 12-030
Ships in 10 Business Days
5% off MSRP $ 18,749.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 17,811.99 USD
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5% off MSRP
$ 18,749.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 17,811.99 USD
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Since getting their start in 1981, Active Autowerke has earned a well-respected reputation in the BMW community for engineering high-quality power solutions for popular BMW models. This supercharger kit will produce 700 horsepower and 480 ft.lbs. of torque on your BMW, while retaining platform integrity and daily driveability. Unique to the design of the Rotrex supercharger is the traction drive system, which eliminates the lag often found in other centrifugal supercharger setups. Power delivery is smooth and dependable, and 100% reversible to stock if you so choose, since each system is designed as a self-contained unit.
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Power Pulley DPK Belt Kit
For vehicles with production date from 6/2008
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For vehicles with production date from 6/2008
Active Autowerke - Corporate Logo
T#:50934275
Part#: 13-001D
Ships in 3 Business Days
New Item
$ 75.00 USD
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$ 75.00 USD
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Free Up Real S65 Power — Engineered the Turner Way Your S65 is already making the power. This kit simply lets you keep more of it. The Active Autowerke Power Pulley Kit for the BMW E9X M3 reduces parasitic drag at the crankshaft, trimming rotational mass and freeing up horsepower that would otherwise be consumed by accessory drive load. The result is a measurable increase in rear-wheel output without sacrificing the balance, cooling capacity, or long-term durability expected from a properly engineered BMW upgrade. The crank pulley is CNC-machined from billet 6061 aluminum and finished with a hard-coat anodize for durability under sustained high-RPM operation. Unlike undersized pulleys that compromise system function, this design maintains proper operating characteristics while delivering real-world gains. Late-2007 production E9X M3 models transitioned to a double-sided (DPK) A/C belt configuration. Rather than forcing a workaround, Active Autowerke developed a proper DPK-compatible solution — including the correct matched belt. Applicable kits also include a spare DPK belt for added insurance. Dyno testing on a Mustang chassis dyno confirms gains of 10–12+ rear-wheel horsepower on an otherwise stock vehicle. Installation is fully reversible and requires no permanent modification. Product Highlights 10–12+ RWHP gain verified on stock S65 engines Complete bolt-on system CNC-machined 6061 billet aluminum crank pulley Hard-coat anodized finish for durability Includes correct replacement drive and A/C belts Spare DPK belt included where applicable Compatible with manual and DCT-equipped E9X M3 Reduces parasitic drag and rotational mass Designed to maintain proper operating temperatures Works in conjunction with Active Autowerke performance software Available for single-sided and double-sided (DPK) belt configurations Fitment Information Confirm whether your E9X M3 is equipped with a single-sided or double-sided (DPK) A/C belt prior to ordering to ensure correct application. A properly engineered solution for enthusiasts who want measurable gains while preserving OEM-level refinement and reliability.
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