This is a Powerflex Black Series front position subframe bushing set, replacing the soft factory rubber front rear-subframe bushings with a 95A durometer polyurethane compound roughly 80% stiffer than stock rubber. The stiffer material minimizes unwanted subframe movement relative to the chassis, improving handling precision and steering feedback while remaining a bolt-in replacement for the OE bushings.

Fitment: BMW 3 Series (E46) and Z4 (E85), all engine options, rear subframe front position bushing set.