BMW Engine Parts for BMW 3 Series E93 (2007-2013)

Clear BMW chassis

Please ensure your correct model is selected

Turner Motorsport has everything you need to upgrade your BMW through our stages of performance or to keep your car in peak condition with our range of the latest in proven OEM cooling parts. Upgrade your cooling system and engine performance with the selections below to give your BMW a performance and reliability advantage.

Sub-Categories

Sort By:

Corteco - Corporate Logo
T#:2157
Part#: 11812283798
In Stock
$ 82.69

This product was last offered at the strikethrough price on
06-23-2026

$ 82.00 USD
Free Shipping
$ 82.00 USD
Free Shipping
Don't neglect your motor mounts! The stock BMW motor mounts are fluid filled and the stiffness of the mount depends on this fluid. But over time the fluid leaks out and the strength of the mount is greatly reduced. A worn motor mount allows the engine to shift. The harder you're driving the more shift will occur. As the engine is moving around it can contact other parts in the engine bay - usually cooling related. The mechanical fan can hit the radiator; the A/C compressor can hit a radiator hose, the exhaust will flex and may break. Twisting of the engine can also lead to shifting problems as the transmission twists with it. There are countless issues related to worn or compressed motor mounts so don't overlook these as a regular replacement item (every 50,000 miles).

This is a replacement stock motor mount used on all M3s since 1995 and the Z4 M. It's also the standard motor mount for Z3 and E46 325xi/330xi models (left side). It can also used as an upgrade for non-M 1992-2006 E36 and E46 6 cylinder models because it's slightly stiffer to reduce flex and for a longer lifespan.

Sold per mount.

This motor mount / engine mount fits the following BMWs:
1995-1999 E36 BMW M3
2001-2005 E46 BMW 325xi 330xi (for left side only)
2001-2006 E46 BMW M3
2008-2011 E90 BMW M3 - Sedan
2008-2013 E92 BMW M3 - Coupe
2008-2013 E93 BMW M3 - Convertible
1997-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Roadster M Coupe
2006-2008 E85 BMW Z4 M Roadster M Coupe

In addition, this can be used as a motor mount upgrade for these models:
1992-1999 E36 BMW 323is 323ic 325i 325is 325ic 328i 328is 328ic
1999-2006 E46 BMW 323i 323ci 325i 325ci 328i 328ci 330i 330ci
Show More Show Less
Goldenwrench Supply Co - Corporate Logo
T#:641286
Part#: FXXOCC-R
In Stock
$ 60.00 USD
Free Shipping
$ 60.00 USD
Free Shipping
Give the plain plastic factory oil cap unit an upgrade with the brand new BLACKLINE Performance Billet Oil Cap Cover. Each cap is CNC formed from T6 Aluminum and anodized in a limited release race inspired red color. Featuring an all new Drip G logo, with the BLACKLINE insignia engraved in the cap handle with a reminder to fill the engine with Synthetic Oil Only. All logos and decorations are finalized through a precision 3D milling process, machined into each cap for the ultimate premium finish. The BLACKLINE Performance Billet Oil Cap Cover will fit most BMW vehicles equipped with the N55, S55, S63, and S65 with the round shaped oil cap found in the following vehicles E90/E91/E92 M3 LCI, F22 M235i, F87 M2/M2 Competition, F80 M3, F82 M4, F10/F90 M5, and more (check your oil cap ensuring that it is the round shape as seen in the product photos). Each kit comes with a Billet Oil Cap Cover, and an Installation Instruction Card. This is a not a full cap replacement. The Billet Oil Cap Cover affixes to the top of your factory oil cap installing easily in minutes.
Show More Show Less
Goldenwrench Supply Co - Corporate Logo
T#:641289
Part#: FXXCET-R
In Stock
$ 65.00 USD
Free Shipping
$ 65.00 USD
Free Shipping
Give the plain plastic factory coolant caps an upgrade with the brand new BLACKLINE Performance Coolant Expansion Tank Cap Cover from Goldenwrench. Each cap is CNC formed from T6 Aluminum and anodized in a limited release race inspired red color. All logos and decorations are finalized through a precision 3D milling process, machined into each cap for the ultimate premium finish. The BLACKLINE Performance Billet Coolant Expansion Tank Cap Cover will fit most BMW vehicles equipped with the N55, S55, S63, and S65 engine with the large coolant tank found in the following vehicles E90/E91/E92 M3 LCI, F22 M235i, F87 M2/M2 Competition, F80 M3, F82 M4, F10/F90 M5, and more (check your coolant cap ensuring that it is the same shape as seen in the product photos). Each kit comes with a Billet Coolant Expansion Tank Cap Cover, and an Installation Instruction Card. This is a not a full cap replacement. The Billet Cap Cover affixes to the top of your factory coolant cap installing easily in minutes.
Show More Show Less

Goldenwrench Supply Co - Corporate Logo
T#:5691134
Part#: FXXOCC-B
In Stock
$ 60.00 USD
Free Shipping
$ 60.00 USD
Free Shipping
Give the plain plastic factory oil cap unit an upgrade with the brand new BLACKLINE Performance Billet Oil Cap Cover. Each cap is CNC formed from T6 Aluminum and anodized in a limited release race inspired blue color. Featuring an all new Drip G logo, with the BLACKLINE insignia engraved in the cap handle with a reminder to fill the engine with Synthetic Oil Only. All logos and decorations are finalized through a precision 3D milling process, machined into each cap for the ultimate premium finish. The BLACKLINE Performance Billet Oil Cap Cover will fit most BMW vehicles equipped with the N55, S55, S63, and S65 with the round shaped oil cap found in a variety of vehicles(check your oil cap ensuring that it is the round shape as seen in the product photos). Each kit comes with a Billet Oil Cap Cover, and an Installation Instruction Card. This is a not a full cap replacement. The Billet Oil Cap Cover affixes to the top of your factory oil cap installing easily in minutes.
Show More Show Less

Goldenwrench Supply Co - Corporate Logo
T#:5691129
Part#: FXXCET-B
In Stock
$ 65.00 USD
Free Shipping
$ 65.00 USD
Free Shipping
Give the plain plastic factory coolant caps an upgrade with the brand new BLACKLINE Performance Coolant Expansion Tank Cap Cover from Goldenwrench. Each cap is CNC formed from T6 Aluminum and anodized in a limited release race inspired blue color. All logos and decorations are finalized through a precision 3D milling process, machined into each cap for the ultimate premium finish. The BLACKLINE Performance Billet Coolant Expansion Tank Cap Cover will fit most BMW vehicles equipped with the N55, S55, S63, and S65 engine with the large coolant tank found in a variety of M vehicles(check your coolant cap ensuring that it is the same shape as seen in the product photos). Each kit comes with a Billet Coolant Expansion Tank Cap Cover, and an Installation Instruction Card. This is a not a full cap replacement. The Billet Cap Cover affixes to the top of your factory coolant cap installing easily in minutes.
Show More Show Less
Goldenwrench Supply Co - Corporate Logo
T#:7244442
Part#: FXXOFH-R
In Stock
$ 147.00 USD
Free Shipping
$ 147.00 USD
Free Shipping
OEM factory oil filter housing caps are made of plastic which can be prone to failure over time. Bring form, function and design to your engine with GoldenWrench's highly anticipated 2022 product release. Introducing the BLACKLINE Performance RED Billet Oil Filter Housing Cap which is designed to increase the functioning longevity and improve aesthetics over the factory plastic part while offering superior built in maintenance features.
Show More Show Less

Goldenwrench Supply Co - Corporate Logo
T#:641268
Part#: FXXOCC
Ships in 1 Business Day
$ 60.00 USD
Free Shipping
$ 60.00 USD
Free Shipping
Give the plain plastic factory oil cap unit an upgrade with the brand new BLACKLINE Performance Billet Oil Cap Cover. Each cap is CNC formed from T6 Aluminum and anodized with an Anthracite Gray color to compliment the factory engine cover. Featuring an all new Drip G logo, with the BLACKLINE insignia engraved in the cap handle with a reminder to fill the engine with Synthetic Oil Only. All logos and decorations are finalized through a precision 3D milling process, machined into each cap for the ultimate premium finish. The BLACKLINE Performance Billet Oil Cap Cover will fit most BMW vehicles equipped with the N55, S55, S63, and S65 with the round shaped oil cap found in the following vehicles E90/E91/E92 M3 LCI, F22 M235i, F87 M2/M2 Competition, F80 M3, F82 M4, F10/F90 M5, and more (check your oil cap ensuring that it is the round shape as seen in the product photos). Each kit comes with a Billet Oil Cap Cover, and an Installation Instruction Card. This is a not a full cap replacement. The Billet Oil Cap Cover affixes to the top of your factory oil cap installing easily in minutes.
Show More Show Less
Goldenwrench Supply Co - Corporate Logo
T#:9901260
Part#: FXXOFH-G
In Stock
$ 147.00 USD
Free Shipping
$ 147.00 USD
Free Shipping

BMW Gray Filter Housing Cap - Blackline Performance Edition Oil is a premium upgrade designed to replace the standard OEM plastic oil filter housing cap. This high-quality billet aluminum cap enhances both the aesthetics and functionality of your BMW's engine.

  • Durable Construction: Made from 6061 T6 aluminum with a hard anodized finish for superior strength and longevity.
  • Improved Performance: Features better heat dissipation compared to the factory plastic cap, enhancing engine performance and reliability.
  • Enhanced Aesthetics: Adds a sleek, high-performance look to your engine bay with 3D precision post-milled detailing and the G Insignia Oil Filter Cage Stabilizer.
  • Easy Installation: CNC-formed hand grips and a 10mm Allen key maintenance port with a built-in scratch plate simplify the installation and maintenance process.
  • Direct Replacement: Retains the factory oil filter stalk and is compatible with BMW S55 and most N series engines using BMW part 11427525334.
  • Increased Longevity: Designed to increase the life span of your oil filter cap and provide a more reliable seal.
Show More Show Less

Burger Motorsports - Corporate Logo
T#:581123
Part#: OCCN55
In Stock
$ 199.00 USD
Free Shipping
$ 199.00 USD
Free Shipping
It's no secret that N55 BMW turbo motors can suffer from oil control problems causing oil to blow through and coat the intercooler and charge piping, gunking up intake valves and the VANOS system, lowering the effective octane, and generally degrading engine performance. The higher your boost levels the more apparent these problems become. The solution to this problem has finally arrived. The BMS oil catch can. While there are other catch cans on the market they all fall short in various areas. Some are mounted on the hot/turbo side of the motor preventing proper vapor condensation. Others utilize hoses that are too small and runs that are too long to allow proper PCV ventilation causing internal motor/ring sealing issues. Some have insufficient or no internal baffle system while others have internal baffles systems that are too restrictive. Some even bypass the PCV system all together venting crankcase gas and odor to the atmosphere. Most are simply repackaged oil catch cans from smaller / lower power motors shoehorned into place in the turbo BMW engine bay. To solve these problems BMS designed their oil catch can kit from the ground up specifically for the turbo BMW application. It features 100% CNC machining with zero welding for a precision fit and long life. The can itself is guaranteed for the life of the vehicle. The hoses exceed the OEM PCV piping in diameter and that flow rate is maintained throughout the entire oil catch can ensuring no excessive crankcase pressure buildup. The BMS OCC retains the factory fully closed loop PCV operation preventing any PCV vapor from leaking to the atmosphere. The mounting locations are selected to minimize the line length, allow more efficient operation, and retain a stealth look. Install takes around 20 minutes, includes all required hardware, and is 100% reversible. Simply unscrew the base of the can or use the drain plug to safely dispose of captured oil with the rest of your used motor oil during oil changes. Made in the USA. FEATURES AND BENEFITS Increases Air Intake Efficiency Promotes Engine Longevity Non-Clogging Air/Oil Separation Double Baffle Free Flow Solid No Restriction Design Retains factory fully closed loop PCV operation Large Intake/Outlet No Tapering Down Stealth Mounting on Cool Side of the Motor Anodized Black Aluminum Made in USA & Guaranteed for Life Simply unscrew base every 3-6 months to empty or use the 1/8th NPT drain plug. Non-Clogging, No Service Needed Air/Oil Separation Double Baffle High flow to eliminate crankcase pressure caused by more restrictive designs Large 16mm+ inlet and outlet exceeds OEM PCV sizing Precision CNC Machined from Solid Blocks of High-Grade Aluminum
Show More Show Less

CSF Race-Spec Oil Cooler - E9x M3
2X Entries Into Our F80 M3 Sweepstakes
CSF - Corporate Logo
T#:384657
Part#: 8025
In Stock
$ 599.00 USD
Free Shipping
$ 599.00 USD
Free Shipping

CSF is one of the premier cooling product specialists available on the market today. One item that is often overlooked is the oil cooler. Luckily CSF has taken up the task of upgrading the oil cooler as well. If the oil runs too hot, it can lead to a reduction in wear protection and damage to the head, block, or the turbo system. This unit has 8 cooling cores and still fits in the stock location without any issues.

Fits the following BMW:
2008-2013 E9X BMW M3

Show More Show Less
Burger Motorsports - Corporate Logo
T#:302901
Part#: BCC-N54-135-335
In Stock
$ 179.00 USD
Free Shipping
$ 179.00 USD
Free Shipping

Oil venting and circulation continues to be a problem on BMW engines and now even more so on the turbocharged N54 and N55 engines. The existing stock system does a very poor job of separating fluid and vapor and this leads to an oily film or even small pools of oil throughout the turbos and intake. We're seeing a lot more 135 and 335 cars with drivability and performance issues because oil has sneaked by the ring seals and is coating the intake piping, intercooler, intake valves, and other critical areas. The problem is worsened with higher boost levels. Oil is excellent for lubricating moving parts but terrible when it gets into the combustion chamber, effectively lowering the octane rating and reducing performance. Our own shop has gone the extra step and offers media blasting of the intake valves to strip away the oily buildup we have seen.

Our shop also strongly recommends an oil catch can be installed in the line for the crankcase vent. The oil catch can traps oil as it leaves the valve cover and holds it in a canister. This catch can is located on the cooler side of the engine where the oil will condense easier and stay in the can. Whatever minimal vapors are left over in the oil is then vented back through the canister and into the intake where it is safe to be burned up in the engine or recirculated back through the system again. This is the way the system was designed! At each oil change simply unscrew the canister and empty the trapped oil with your regular used oil. The Burger Tuning oil catch can is the best we have seen so far. Installing one of these will avoid costly repairs in the future and help maintain your boost and performance. It's one of the smartest modifications you can make because it demonstrates a well-thought out tuning strategy and care for the condition of your engine.

The BMS Oil Catch Can is made from aluminum and with a stealthy black anodized finish. It installs on the cooler side of the engine with a dedicated bracket and new oversized vent lines. The location is key as heat will evaporate the oil and send too much vapor back into the engine (where cooler air will turn it back into fluid). The BMS OCC also has a factory-like appearance. Since BMS designed their catch can from scratch they can guarantee it fits and performs correctly for the N54/N55 engine, unlike other catch cans on the market that are poorly retrofitted from other applications and under-sized for the N54 engine.

Note: Since the crankcase vent system is considered part of the overall emissions system, installing this may be a violation of local, state, and federal laws. While exemptions are made for track/race and off-road use, check with your local state inspection facility on using this in street-driven vehicles

BMS Oil Catch Can Features:
+ Increases air intake efficiency
+ Promotes engine longevity
+ Double-baffled design allows excellent air/oil separation
+ Large In/Out ports (no tapered sizes that slow flow)
+ Stealth mounting on cooler side of engine bay (promotes condensation of oil to vapor)
+ Anodized black lightweight aluminum
+ N54 version mounts out of sight under the cowl
+ Made in USA with a lifetime guarantee

Show More Show Less
Goldenwrench Supply Co - Corporate Logo
T#:641288
Part#: FXXCET
In Stock
$ 65.00 USD
Free Shipping
$ 65.00 USD
Free Shipping
Give the plain plastic factory coolant caps an upgrade with the brand new BLACKLINE Performance Coolant Expansion Tank Cap Cover from Goldenwrench. Each cap is CNC formed from T6 Aluminum and anodized with an Anthracite Gray color to compliment the factory engine cover. All logos and decorations are finalized through a precision 3D milling process, machined into each cap for the ultimate premium finish. The BLACKLINE Performance Billet Coolant Expansion Tank Cap Cover will fit most BMW vehicles equipped with the N55, S55, S63, and S65 engine with the large coolant tank found in the following vehicles E90/E91/E92 M3 LCI, F22 M235i, F87 M2/M2 Competition, F80 M3, F82 M4, F10/F90 M5, and more (check your coolant cap ensuring that it is the same shape as seen in the product photos). Each kit comes with a Billet Coolant Expansion Tank Cap Cover, and an Installation Instruction Card. This is a not a full cap replacement. The Billet Cap Cover affixes to the top of your factory coolant cap installing easily in minutes.
Show More Show Less


OEM Hengst Engine Oil Filter Kit - Pack of 10 - N20 N52 N54 N55 ...
5X Entries Into Our F80 M3 Sweepstakes
5X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat! Hengst is our preferred OEM filtration supplier!
Hengst - Corporate Logo
T#:567542
Part#: 11427566327
In Stock
$ 105.99 USD
Free Shipping
$ 105.99 USD
Free Shipping
Stock up on oil filters and save some cash! You are going to need them, why not get a discount? This is an OEM Hengst oil filter kit made with the same materials and design as the original oil filter used in BMW dealers (but at a better price!). The kit includes the oil filter, housing cap o-ring, and washer.
Show More Show Less
Active Autowerke Power Pulley Kit - E9x M3
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
Free Shipping
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
Free Shipping
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.
Show More Show Less
Burger Motorsports - Corporate Logo
T#:588633
Part#: OILVALVE-RED
Ships in 2 Business Days
$ 59.00 USD
Free Shipping
$ 59.00 USD
Free Shipping
This simple engine oil cooler valve from Burger Motorsports increases flow to your fender mounted engine oil/air heat exchanger resulting in lower engine oil temperatures and more consistent performance during heavy throttle. Less restrictive than the spring-loaded units. Installs in minutes and is fully reversible. CNC machined for a precise fit and anodized for protection. Made in the USA. Requires BMW's external sport engine oil cooler which is standard on most 2008+ models, optional on 2007 E9x models. FEATURES AND BENEFITS Easily lower engine oil temperature Stock oil cooler will work more efficient More consistent performance CNC Machined for a perfect fit Made in USA
Show More Show Less

MTC - Corporate Logo
T#:583467
Part#: 61129217031
Back Ordered
$ 138.99 USD
Free Shipping
$ 138.99 USD
Free Shipping
If your BMW has been in an accident in which the Battery Safety Terminal has been tripped you will need a new positive cable connection pole in order to restart the vehicle.

Schrick - Corporate Logo
T#:2474
Part#: TMS2474
Ships on Jan 27, 2027
$ 6,478.60 USD
Free Shipping
$ 6,478.60 USD
Free Shipping
This is one full set of Schrick cam shafts, 4 cams total, for the S65 V8 M3 engine. These cams are the 284 degree version, and includes two intake cams and two exhaust cams. Professional installation is a must due to the complexity of the dual VAN0S V8 motor.
Show More Show Less
Schrick - Corporate Logo
T#:2500
Part#: TMS2500
Ships on Jan 27, 2027
$ 6,478.60 USD
Free Shipping
$ 6,478.60 USD
Free Shipping
This is one full set of Schrick cam shafts, 4 cams total, for the S65 V8 M3 engine. These cams are the 292 degree version, and includes two intake cams and two exhaust cams. Professional installation is a must due to the complexity of the dual VAN0S V8 motor.
Show More Show Less

CSF Universal Large Single-Pass Oil Cooler - Universal Application ...
2X Entries Into Our F80 M3 Sweepstakes
Universal fitment design - modifications may be necessary to run this cooler
CSF - Corporate Logo
T#:53608839
Part#: 8371
Ships in 3 Business Days
New Item
$ 499.00 USD
Free Shipping
$ 499.00 USD
Free Shipping
CSF redesigned this cooler and went with a more traditional inlet/outlet orientation. The new single pass design features high efficiency and high durability, but with vertically oriented inlet and outlet connections.
Show More Show Less
Corteco - Corporate Logo
T#:362268
Part#: 22116773744
Ships in 1 Business Day
$ 202.99 USD
Free Shipping
$ 202.99 USD
Free Shipping
Keep your engine securely mounted

Active Autowerke - Corporate Logo
T#:57616348
Part#: RTF-1L
Ships in 3 Business Days
New Item
7% off MSRP $ 140.00

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

$ 130.00 USD
Free Shipping
7% off MSRP
$ 140.00

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

$ 130.00 USD
Free Shipping
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).
Show More Show Less

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
Free Shipping
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
Free Shipping
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.
Show More Show Less
Active Autowerke - Corporate Logo
T#:57616347
Part#: 12-032-C38
Ships in 10 Business Days
New Item
$ 23,749.00 USD
Free Shipping
$ 23,749.00 USD
Free Shipping
The Active Autowerke Supercharger System is powered by a Rotrex C38-92R Supercharger Unit mounted with a custom CNCed bracket that uses a dedicated drive belt system, while eight high flow fuel injectors are used to supply the additional required fuel. Active Autowerke's Performance Software, available for 91-93 octane, race gas, and octane levels unique to other countries, is carefully calibrated, and is at the heart of the system to provide an unparalleled driving experience. Keeping within the factory's OBDII parameters, the Active Autowerke Supercharger System ensures consistency for everyday driving. The Level 4 system includes a water/methanol injection system with upgraded pulley and custom software.
Show More Show Less
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
Free Shipping
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
Free Shipping
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.
Show More Show Less