036140B: Rear suspension bush kit

The rear axle of an E46 M3 or a Z4 M, rebuilt in one box.

80 ShA polyurethane — the red compound. StrongFlex match this grade to the hardness of the original metal-rubber bushes, so the car keeps the ride it left the factory with. What changes is what the bush is made of: polyurethane does not perish, does not tear out, and shrugs off oil, grease, salt and solvents.

The M car carries more grip and more power through the same arms, so the bushes go off faster and the effect is bigger when they do. Twelve pieces of polyurethane take the slop out of the trailing arms, the control arms and the anti roll bar, and the axle stops arguing with the throttle.

Every StrongFlex product ships with the correct grease for fitting.

• 2x 031173B Rear trailing arm front bush
• 2x 031174B Rear control arm upper inner
• 2x 031176B Rear control arm lower inner
• 2x 031586B Rear anti roll bar bush
• 2x 031962B Rear anti roll bar link to anti roll bar bush
• 2x 031963B Rear anti roll bar link to arm bush

Fits BMW E46 M3 (00–06) and BMW Z4 M — E85 / E86 (06–08).
For a standard E46, a Compact or a non-M Z4 take kit 036048B instead — different rear axle.

Pick the diameter of the bar actually on your car — 21 mm, 22 mm, 23 mm, or Custom if yours is an aftermarket bar. Measure it rather than going by the model year; M cars were built with more than one.
Red 80 ShA — close to the original bush hardness. Stability and precision without giving up comfort.
Yellow 90 ShA — for sport and lowered suspension. Much stiffer, made for speed and hard driving.

Both compounds have the same resistance to weather, oil, grease, salt, acid and solvent — the difference is hardness alone.