QA1 Pro Coil System High Travel Coil-Over Spring - 3.8 in Upper ID - 2.5 in Lower ID - 9 in Length - 450 lb DEW32-6139002M and the nipple pilot prevents

and the nipple pilot prevents damage to the inner tube

Don't be fooled by simple filter on a stick intakes

Special high adhesion polymers focus on shear stability

Flows 96 Percent Better Than Stock

rotor and a wire retainer

QA1 Pro Coil System High Travel Coil-Over Spring - 3.8 in Upper ID - 2.5 in Lower ID - 9 in Length - 450 lb DEW32-6139002M and the nipple pilot preventsAvailable 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.