H&R 60mm ID Single Race Spring Length 100mm Spring Rate 200 N/mm or 1142 lbs/inch - RF100200 fits_2009-2012`Porsche`911 Allows custom tuning of your

Allows custom tuning of your suspension

clean air (from your car and your new shocks)

Garage Parts Installer Series Muffler

silverado 2500

whether it be a launch or high G cornering loads

H&R 60mm ID Single Race Spring Length 100mm Spring Rate 200 N/mm or 1142 lbs/inch - RF100200 fits_2009-2012`Porsche`911 Allows custom tuning of yourH&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