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Suspension Bushings

Softest <> OEM <> Powerflex Street (75A) <> AKG Street (95A) & Powerflex Race (95A) <> AKG Track (75D) <> Hardest

Rubber OEM bushings deteriorate with age, becoming softer and more pliable.  This allows excess movement of suspension components and less control over suspension geometry.  The result is excessive tire wear, braking instability and poor handling. 

Bushing Deflection under load.

Which bushings are best for my dedicated race car?  AKG's 75D is by far the hardest polyurethane compound available for a BMW and will tremendously improve many aspects of a race car's handling characteristics. 75D will control a racecar's suspension geometry during the rapid movements a race car experiences on the track.  The only material harder is aluminum, which is only suitable for a track only car.

Which bushings are best for my high performance street car?  High performance street cars will see a noticeable increase in performance with AKG's medium durometer bushings or Powerflex's street or race bushings. These 80A, 85A, 90A and 95A durometers utilize the most ideal hardness and compound for street/performance use, providing for an increase in performance without a large increase in Noise, Vibration or Harshness (NVH).


FCC30369 - Centered control arm bushing for street or mild performance use

BMW E30 (318 323 325 M3),

BMW E36 (318 318ti 323 325 328 M3),

BMW Z3 and M Roadster


SF90D - These E90 subframe bushings are recommended for race and track use only.

BMW 1 Series, E82 / E88 (128, 135, 1M)

BMW 3 Series, E90 / E92 / E93 (3325, 528, 330, M3)


SF46D - Recommended for Race or Track use only.

BMW 3 Series, E46 (323, 325, 328, 330 & M3)

BMW Z4 (all)




SF39D - Recommended for race or track use

BMW 5 Series, E39 (520, 523, 525, 528, 530, 535, 540, M5) 1997- 2003


RTAB3432D - recommended for track and race use.

BMW 5 Series E34 (525i, 530i, 535i, 540i, M5) 1987-1995

BMW 7 Series E32 (735i, 735iL, 740i, 740iL, 750iL) 1988-1994 

AKG Motorsports hardest poly bushing material.




Powerflex polyurethane bushings are designed to decrease the amount of deflection in your car's suspension for better handling, driver feedback, and tire wear. Powerflex uses premium polyurethane materials for minimal NVH (noise, vibration, harshness) and increased longevity over the stock rubber bushings.

Offered in Street (80A) and Race (95A) Hardness, and in five sizes; 23mm, 24mm, 25mm, 26mm, and 27mm.  Please check your Sway Bar size before ordering.