Bilstein B4 2005 Audi S4 Base Rear Twintube Shock Absorber 2013-audi-tt-rs-quattro-esi1289916 and outflows the factory intake

and outflows the factory intake by 3%

A urethane plug is also included for those cold weather applications where you want to block the auxiliary air scoop

This version does not include an AFR regulator

straight and 90° ends swivel for easy alignment

This OBD plug-in device is easy to use with a Windows 7 and newer laptop and WiFi connection

Bilstein B4 2005 Audi S4 Base Rear Twintube Shock Absorber 2013-audi-tt-rs-quattro-esi1289916 and outflows the factory intakeBilstein 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. Installation Instructions Warranty Material Safety Data Sheet Material Safety Data Sheet