Bilstein B6 2004 BMW 525i Base Front 36mm Monotube Strut Assembly 1976-ford-e-250-econoline-club-wagon-base-esi5910526 Replace the Polyphonic Harmonizer behind

Replace the Polyphonic Harmonizer behind the primary muffler in the BORLA® ATAK® system with muffler 60679 to attain the S-Type sound level (quieter than ATAK®)

75" diameter Cat-Back(tm) system features a Merge X-Pipe for increased performance and improved sound

Muffler contains Polyphonic Harmonizer Technology

the S-Type sound level

Bilstein B6 2004 BMW 525i Base Front 36mm Monotube Strut Assembly 1976-ford-e-250-econoline-club-wagon-base-esi5910526 Replace the Polyphonic Harmonizer behindBilstein B6 Performance dampers are a performance upgrade to OE dampers designed to be paired with the OE factory spring. These dampers offer application specific valve settings with a monotube design to bring out the best handling performance of a vehicle. Each damper is rigorously tested for quality that meets or exceeds OE standards. B6 Performance dampers will provide improved safety and handling performance with the added benefit of world famous