H&R 60mm ID Single Race Spring Length 80mm Spring Rate 30 N/mm or 171 lbs/inch - ZF080-030 Aluminum Tubing This 6-1/2” tall 360-degree radial

This 6-1/2” tall 360-degree radial flow air filter features a 3-1/2” round flange and our oiled Pro 5R media with five layers of progressively finer cotton gauze media for maximum airflow and performance

We saw exceptional improvement in our trail simulation heat-soak testing where

and if that heat isn't dissipated

This Silver Bullet throttle body spacer comes with a pair of 1/8” NPT ports that can be used for vacuum accessories or water methanol injection

Upgrade your G22 4-Series with AutoTecknic's Replacement M-Inspired Carbon Fiber Mirror Covers and experience the difference for yourself

H&R 60mm ID Single Race Spring Length 80mm Spring Rate 30 N/mm or 171 lbs/inch - ZF080-030 Aluminum Tubing This 6-1/2” tall 360-degree radialH&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