H&R 2.5 inch ID Single Race Spring Length 12 inch Rate 165 lbs/inch - R25120165 Battery Jump Starters 6L models are equipped with

6L models are equipped with 18k F spring rates

Camaro Cat Back

4 Liter FMX

spring-loaded T-bolt clamps and heavy-duty

H&R 2.5 inch ID Single Race Spring Length 12 inch Rate 165 lbs/inch - R25120165 Battery Jump Starters 6L models are equipped withH&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