H&R 07-08 Audi RS4 (AWD) 4.2L FSI Quattro Sport Spring - 50300 fits_2007-2013`BMW`M3 37 percent greater fin surface

37 percent greater fin surface area for improved heat transfer in cramped cooling stack

7 models are equipped with 14k F / 8k R spring rates

Fits to CORSA C7 exhaust systems only

This kit features hoses constructed from five layers of silicone with heat-resistant embedded fibers and all-aluminum hose junctions

H&R 07-08 Audi RS4 (AWD) 4.2L FSI Quattro Sport Spring - 50300 fits_2007-2013`BMW`M3 37 percent greater fin surfaceSport Spring kits are H&R's number one selling product. Enhance the look of your vehicle with a reduced fender well gap. H&R'sport Springs lower the vehicle's center of gravity and reduce body roll for better handling. The progressive spring rate design provides superb ride quality and comfort. A lower wind resistance signature will make the vehicle more streamlined and improve gas mileage. If you are only looking to improve one part of your vehicle's