036140A: Rear suspension bush kit SPORT

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

90 ShA polyurethane — the yellow SPORT compound. StrongFlex build this grade for tuned and lowered cars: the suspension gets noticeably stiffer, the geometry stops moving under load and the car holds its line when you push it.

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

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 036048A 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.