AST Suspension 5100 Series Coilovers (Excludes Front/Rear Top Mounts) (True Coilover) - 2005-2011 BMW 3 Series 330i (E9X) Cobalt Spring rate 140 N/mm

Spring rate 140 N/mm

2010 Audi S5 (w/ EDC)

Add to that engine bat contaminants to your 1996-1997 Subaru Impreza WRX Brighton (GC/GF) such as oil leaks that also help to degrade the performance of steering rack mount bushings

The 5100 Series shock absorbers for the 2000-2005 BMW 3 Series 330i Sedan/Touring/Coupe/Convertible (E46) utilize non-inverted / high performance monotube technology

giving you full control over your Toyota Supra suspension setup

AST Suspension 5100 Series Coilovers (Excludes Front/Rear Top Mounts) (True Coilover) - 2005-2011 BMW 3 Series 330i (E9X) Cobalt Spring rate 140 N/mmThe 5100 Series shock absorbers for the 2005 2011 BMW 3 Series 330i (E9X) utilize inverted upside down technology. The inverted design is race proven technology and produces an extremely strong damper, providing better suspension geometry under heavy lateral and braking loads as seen in a road and track environment. The 5100 Series shock absorbers give your car a better performance than the standard twin tube design. With the 5100 Series suspension