Bilstein B4 1986 Audi 4000 Quattro CS Front Twintube Strut Insert 1998-bmw-328is-base-esi1982602 5" diameter Cat-Back system features

5" diameter Cat-Back system features our latest engineering techniques to give you our aggressive ATAK sound without any "drone" inside the vehicle

It features BORLA(r)'S patented Multi-core 6 tube design for maximum flow

Add optional resonator 60707 for additional sound control

This System is NOT ECE-R59 Approved

5" Oval x 34" Long Body 39

Bilstein B4 1986 Audi 4000 Quattro CS Front Twintube Strut Insert 1998-bmw-328is-base-esi1982602 5" diameter Cat-Back system featuresBilstein B4 OE Replacement dampers are specifically engineered to be the best choice for maintaining the original ride quality of your vehicle, while meeting or exceeding OE standards. These dampers are the ideal choice for the driver looking to restore the original performance and handling of their vehicle, with the added benefit of world famous Bilstein quality. Restores original driving comfort, handling and safety High power reserves for maximum