Hypercoils 12" UHT Barrel 2-1/2" I.D. Coil-Over Spring - 300 lb. Off-Shore Helmet Blow Off Valve

Blow Off Valve

Factory length for '71-'79 Oldsmobile 260-403 V8

Chain tether keeps external clip close when detached or can be replaced with safety wire for an additional layer of security

Peak RPM memory recall provides quick review of the highest RPM achieved since the last clear

Hypercoils 12" UHT Barrel 2-1/2" I.D. Coil-Over Spring - 300 lb. Off-Shore Helmet Blow Off ValveUltra High Travel (UHT) Hypercoils are designed specifically for light rate high travel coil over applications (dirt & pavement). UHT designs meet the requirements of soft spring big bar set ups and remain consistent in free length & installed height. The new UHT design features a larger "body bulge" over our standard OBD designs, allowing for additional deflection, rate linearity and resistance to bowing. Currently available in 12", 14", 15" & 16"