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Drivetrain Mounts and Upgrades

From the factory, engine and transmission mounts are rubber and thus a wear component. Worn out engine or transmission mounts create sloppiness and a disconnect between the driver and your BMW's powerplant. If your vehicle is purpose built for the track, we recommend solid engine and transmission mounts. These have zero deflection, but come at the expense of added NVH (noise, vibration, and harshness). Poly engine and transmission mounts offer a good balance between OEM rubber and solid mounts for those with mixed purpose vehicles, offering great performance and connection with little sacrifice in terms of NVH.

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Polyurethane Transmission Mount Set - Street

T#:381356

Part#: 002705ECS02A

In Stock

Sale - Save 10% $ 117.99

This product was last offered at the strikethrough price on
06-13-2026

$ 106.19 USD

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This product was last offered at the strikethrough price on
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$ 106.19 USD

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ECS Tuning's Polyurethane Transmission Mounts are designed to address the vital role of transmission mounts in your vehicle's suspension. The factory mounts are notorious for failures that can result in over-revving, mis-shifts, and in extreme cases, potential chassis damage. Our polyurethane mounts provide a robust solution, engineered for both street and track applications, guaranteeing enhanced performance while eliminating concerns about torn mounts.

Polyurethane stands out with its exceptional toughness, durability, and impressive wear resistance compared to rubber. It also exhibits resistance to water, oil, and grease while retaining its original shape even when subjected to significant compression. By reducing deflection, polyurethane facilitates effective power transfer. While there may be a slight increase in NVH (Noise, Vibration, Harshness), the benefits far outweigh this minor compromise in ride comfort. With a polyurethane durometer of 70A, our street mounts are versatile, offering both daily driving comfort and track durability. For more track-oriented enthusiasts, we provide stiffer mounts with an 80A durometer rating.

For a hassle-free installation, we supply a comprehensive DIY guide. ECS Tuning ensures that you are fully supported from start to finish.

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ECS Heavy Duty Differential Bushing - E30, 318ti, Z3

T#:30662812

Part#: 055059LA01

In Stock

Sale - Save 56% $ 52.99

This product was last offered at the strikethrough price on
04-28-2026

$ 23.24 USD

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Sale - Save 56%

$ 52.99

This product was last offered at the strikethrough price on
04-28-2026

$ 23.24 USD

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As your E30 ages, the rear differential bushing can crack, dry rot, and split. It's time for an upgrade. The ECS Tuning Heavy Duty Differential Bushing is crafted with performance in mind. Instead of using polyurethane, which is known for increasing NVH, the enthusiasts at ECS chose HD 70D rubber. This material offers a close-to-factory feel without the excess deflection of softer bushings, ensuring a pleasurable driving experience free from differential whine and excess movement.

Features & Benefits:

Eliminates Weak OEM Mount: The aging E30 chassis deserves an upgrade. Replace your old, cracked, and worn factory bushing with this HD alternative for improved performance. Perfect for Street or Track: Constructed from HD rubber instead of polyurethane or Delrin, this bushing provides comfort for daily driving while remaining effective in performance applications. Added Responsiveness: The 70D HD rubber compound is stiffer than the stock material, reducing drivetrain movement and effectively locking down your rear differential. Easy Installation: Precision-manufactured to the exact specifications of your OEM differential bushing, the ECS heavy-duty replacement installs just like the factory component. Whether you are replacing an aging factory bushing, removing excess driveline movement, or balancing performance and comfort, ECS Tuning has you covered with their Heavy Duty Rear Differential Bushing.

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BMW E46 Z4 Front Position Differential Bushing - Performance Polyuret...

T#:363116

Part#: 002447ECS02

In Stock

Sale - Save 25% $ 66.99

This product was last offered at the strikethrough price on
06-13-2026

$ 50.24 USD

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Sale - Save 25%

$ 66.99

This product was last offered at the strikethrough price on
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$ 50.24 USD

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Enhance your driving experience with ECS Tuning's Performance Polyurethane Differential Bushings. These meticulously engineered bushings offer a direct connection between your right foot, the engine, and the chassis, making them an essential upgrade.

Say goodbye to the softness of factory rubber differential bushings that absorb vibrations and reduce performance.
ECS Tuning's polyurethane bushings eliminate the deflection found in factory rubber bushings, resulting in improved power transfer from the differential to the wheels.
Experience enhanced throttle control, whether you're navigating a challenging canyon road, drag racing, or simply commuting.

Unlike delrin or solid differential mounts, these bushings deliver improved performance without introducing harshness or excessive vibration.

Crafted from durable 88A durometer polyurethane and enhanced with a black anodized 6061-T6 aluminum sleeve.

Resistant to chemicals, ozone degradation, road salt, and general wear and tear, ensuring a longer service life.

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Performance Polyurethane Differential Bushing - Front Position - E36 ...

T#:384599

Part#: 002447ECS04KT2

In Stock

Sale - Save 25% $ 66.47

This product was last offered at the strikethrough price on
06-13-2026

$ 49.85 USD

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Sale - Save 25%

$ 66.47

This product was last offered at the strikethrough price on
06-13-2026

$ 49.85 USD

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Your E36's rear differential is indirectly connected to your right foot through the engine and driveline, and connected to the seat of your pants through the chassis. Soft factory rubber differential bushings absorb vibrations between chassis and differential, providing comfort and softness in both of these connections. ECS Tuning's In-House Engineered Performance Polyurethane Differential Bushing eliminate deflection permitted by factory bushings, improving the connection you feel to your differential. Removal of this slop allows for crisper power transfer from differential to wheels, which means better throttle control while carving a canyon road, drag racing, sliding the rear end out, or just driving to work. This is achieved without the harshness or vibration associated with delrin or solid differential mounts. Featuring a tough 88A durometer polyurethane and Black anodized 6061-T6 aluminum Sleeve, our Performance Polyurethane Differential Bushings are more resistant to chemicals, ozone degradation, road salt, and general wear and tear than factory rubber bushings, resulting in a longer service life.

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ECS & Turner Performance Drivetrain Bushing Package - E82/88 E9X N52 ...

T#:24344778

Part#: ECSTMSPDBKT

In Stock

Sale - Save 8% $ 1,190.99

This product was last offered at the strikethrough price on
05-03-2026

$ 1,096.14 USD

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$ 1,190.99

This product was last offered at the strikethrough price on
05-03-2026

$ 1,096.14 USD

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Turner recommends running drivetrain mounts of all the same variety - if you are using poly engine mounts, you should also use poly transmission mounts. This kit is your solution to make sure all components of your vehicle are working with each other to achieve the performance you're looking for. Polyurethane material is more resistant to water, ozone, and chemicals, maintaining its resiliency and elasticity longer than conventional rubber. Keep your vehicle planted for spirited driving while having crisper throttle response and reduce drivetrain movement along with wheel hop. Kit includes: Turner Engine Mount Set - 60A Polyurethane ECS Transmission Mount Set - Street 70A Polyurethane ECS Differential Bushing Set - 95A Polyurethane ECS Subframe Mount Set - 95A - Polyurethane

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Motor And Transmission Mount Kit

T#:15744033

Part#: 071299048620-KT

In Stock at Vendor

Sale - Save 7% $ 129.99

This product was last offered at the strikethrough price on
05-03-2026

$ 120.55 USD

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Sale - Save 7%

$ 129.99

This product was last offered at the strikethrough price on
05-03-2026

$ 120.55 USD

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With exposure to heat and elements, your mounts will break down with increasing age. A secure mount is vital to reduce drivetrain vibration and transfer as much horsepower to the wheels as possible and provide positive shifts. Turner Motorsport has created a kit that includes motor and transmission mounts, as well as all necessary mounting hardware.

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Billet Diff Lock Down Kit

T#:21176906

Part#: VTT-A9X-DLD

In Stock

Sale - Save 7% $ 313.99

This product was last offered at the strikethrough price on
05-04-2026

Starting at $ 291.99 USD

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Sale - Save 7%

$ 313.99

This product was last offered at the strikethrough price on
05-04-2026

Starting at $ 291.99 USD

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VTT noticed a hole in the A9X/Z4 market for a high-quality, lightweight, NVH-friendly, and easy-to-install Diff Lock Down kit to improve diff stability under launching, and hard cornering. Vargas went to work on a very innovative design that 100% positively locks the diff down from movement, while shielding it from adding a ton of NVH, and can be used with the stock diff, and subframe bushings. This design uses existing mounting points on the vehicle, you do NOT have to remove the subframe or the Diff to install. Simply remove 4 diff bolts, drill two holes in the subframe slightly bigger, install two M10 riv-nuts, and install the lockdown, you do not even have to move the exhaust. A typical install can be 15-30 minutes for someone who is experienced. You will need a Riv-nut tool to install the Riv-nuts as one is not included. Features: Lightweight 1.5 lbs for the entire lockdown plate Uses FOUR connection points on the Diff, and two on the subframe for the ultimate in positive diff location, this will stop all diff movement on launch, saving your guibos, etc 100% Billet construction from 6061-T6 aluminum Anodized in 4 colors for corrosion resistance, a long-lasting finish, and good looks The subframe does NOT have to be removed for installation Uses all 12.9 grade hardware Does not add excessive NVH Positively locks down the diff to eliminate all unwanted movement under launches, acceleration, cornering, etc.

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Complete Performance Polyurethane Differential And Subframe Bushing S...

T#:56038061

Part#: E9XSBFRDFFBKT2

In Stock

$ 491.99 USD

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$ 491.99 USD

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This complete upgrade package is designed to put an end to steering slop. Utilizing a high performance 95A durometer polyurethane formulation, this kit replaces the mushy OEM rubber with proven rigidity.

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Driveshaft Overhaul Kit - With Giubo and CSB - E34, E36, E39, F54, F6...

T#:41458827

Part#: 26111227869TKT

Ships in 3 Business Days

Sale - Save 26% $ 242.99

This product was last offered at the strikethrough price on
04-20-2026

$ 180.37 USD

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$ 242.99

This product was last offered at the strikethrough price on
04-20-2026

$ 180.37 USD

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This Driveshaft Flex Disc and Center Support Bearing Kit includes a high-quality giubo, durable center support bearing (CSB), and all essential installation hardware. Designed for precise fitment, this kit restores drivetrain stability, reduces vibration, and ensures reliable performance in BMW driveline repairs.

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Engine Mount And Poly Inserts - Street - Ultimate Fix

T#:56291056

Part#: 22118743621KT2

Back Ordered

$ 137.99 USD

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$ 137.99 USD

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Built around a fresh URO OE-spec Engine Mount and reinforced with a Powerflex Street Polyurethane Insert, this kit locks down excessive engine play. Factory rubber mounts prioritize complete isolation at the expense of driver feedback.

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