Bilstein B12 13-16 Porsche 911 Carrera 4 H6 3.4L/4S H6 3.8L Front and Rear Suspension Kit 1999-porsche-911-carrera-esi4399134 This Cat-Back system contains a

This Cat-Back system contains a Merge X-Pipe for increased performance and improved sound

ZoneControl CR is a revolutionary technology delivering position sensitive damping

System contains NPP valves

BORLA® Cat-Back™ & Axle-Back multi-core technology is designed to unleash hidden horsepower

Borla(r) system has a valve simulator to prevent the Check Engine Light from coming on

Bilstein B12 13-16 Porsche 911 Carrera 4 H6 3.4L/4S H6 3.8L Front and Rear Suspension Kit 1999-porsche-911-carrera-esi4399134 This Cat-Back system contains aBilstein B12 (Pro Kit) suspension kits include a complete set of Bilstein Performance dampers paired with Eibach (Pro Kit) springs that provide moderate lowering between 24 40mm (depending on application). These kits offer dampers and springs that are tuned for each specific application to provide the best fixed height lowering solution. Bilstein B12 (Pro Kit) suspension kits provide the perfect combination of suspension dynamics, quality and