H&R 2.5 inch ID Single Race Spring Length 18 inch Rate 500 lbs/inch - R25180500 fits_2007-2008`Audi`RS4 The engine braking created will

The engine braking created will eliminate overuse of the brakes and prevent them from overheating

This Front Essential Vehicle Bushing Kit replaces worn factory bushings with high-performance elastomer components that reduce flex

The Mishimoto F1X M5/M6 Charge Pipes are a durable

7L Cummins and features a tube and fin design optimal for heavy load towing and rapid load changes

5 Inch OD Carbon Fiber Tips Included

H&R 2.5 inch ID Single Race Spring Length 18 inch Rate 500 lbs/inch - R25180500 fits_2007-2008`Audi`RS4 The engine braking created willH&R 2. 50" I. D. Race Springs are made with extremely high tensile strength wire alloy which allows the use of a thinner wire. Manufactured using advanced materials and precision technology in Germany, H&R 2. 50" I. D. Race Springs are crafted from special lightweight (hf) 54SiCr6 spring steel. For any given spring rate, they are on average 15% lighter and have 10% more travel than competitors' springs. Main springs range from 6" to 18" in length and