Bilstein B12 (Pro-Kit) 17-20 Audi A4 Front Suspension Lowering Kit (w/o Electronic Suspension) 1991-jeep-wrangler-islander-esi3915702 Replace the Polyphonic Harmonizer behind

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

This system includes functioning MDS (multiple-displacement system) valves

and enhanced fuel economy

Pipe Diameter/3

Bilstein B12 (Pro-Kit) 17-20 Audi A4 Front Suspension Lowering Kit (w/o Electronic Suspension) 1991-jeep-wrangler-islander-esi3915702 Replace the Polyphonic Harmonizer behindBilstein 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