H&R 2.5 inch ID Single Race Spring Length 12 inch Rate 185 lbs/inch - R25120185 Batteries Constructed from four layers of

Constructed from four layers of silicone with embedded heat-resistant fibers

including AMG models

resulting in quicker engine warm-up (Mishimoto thermostat activates at 200 F vs

Dual 3" Polished Tips: Finishing off this system are dual 3" diameter

and a flawless high-gloss finish

H&R 2.5 inch ID Single Race Spring Length 12 inch Rate 185 lbs/inch - R25120185 Batteries Constructed from four layers ofH&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