H&R 60mm ID Single Race Spring Length 250mm Spring Rate 120 N/mm or 686 lbs/inch - RF250120 Diff Covers 100% cfm Flow Gain

100% cfm Flow Gain

3-percent over stock radiator

Replacement Air Spring For Kit 89355

GReddy 03-07 Nissan 350Z 13 Row Oil Cooler Kit HB231 Z33

H&R 60mm ID Single Race Spring Length 250mm Spring Rate 120 N/mm or 686 lbs/inch - RF250120 Diff Covers 100% cfm Flow GainH&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