H&R 60mm ID Single Race Spring Length 120mm Spring Rate 130 N/mm or 742 lbs/inch - RF120130 Switch Panels helping maintain consistent airflow and

helping maintain consistent airflow and long-term performance

advanced Flow Engineering

Includes Electronically Controlled Valve Before the Exhaust Muffler to Quickly Switch Between Muffled to Wide Open with the Push of a Button

Clear Sight Window for Convenient Filter Inspection without Disassembly

H&R 60mm ID Single Race Spring Length 120mm Spring Rate 130 N/mm or 742 lbs/inch - RF120130 Switch Panels helping maintain consistent airflow andH&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