QA1 Pro Coil High Travel Coil-Over Spring - 4.125 ID X 10 750# Silver 4704021-20 121 cc Chamber

121 cc Chamber

Available Coilover Spring Sizes

Extended drive and idler shaft for additional support in the cover eliminating dynamic shfaft deflection at increased RPM levels

Includes a selection of 20 bump stop pucks ranging from 50 to 75 durometer

Gasket High Performance / High Flow Thermostat - 180 Degrees

QA1 Pro Coil High Travel Coil-Over Spring - 4.125 ID X 10 750# Silver 4704021-20 121 cc ChamberAvailable in 7", 9", 10", 12", 14" and 16" lengths, QA1 offers an assortment of high travel springs with a silver powder coated finish. Made in the USA, these 2" I. D. high travel springs are manufactured from specially designed high tensile, chrome silicon alloy spring wire, which allows them to have fewer coils and a smaller wire diameter. As a result, these springs are lighter and have increased travel due to the larger distance between the coils.