QA1 3-1/2in ID Tapered High Travel Spring - 10in Length x 450lbs/in - Silver Powder Coated

Built from chrome silicon, this QA1 high travel coilover spring measures 10 inches long with a 450 lb/in spring rate and a 3.57-inch inner diameter. Its tapered end design helps maximize travel while the durable silver powder coat finish protects against corrosion. This spring is designed to remain within 2% of its original free height for its lifetime, offering a solid option for a range of vehicles including classics like the 1968-1972 Chevrolet Chevelle and 1968-1972 Pontiac GTO.

QA1 makes these springs in the USA, focusing on keeping them as light as possible without sacrificing performance. The spring rate is chosen to provide a noticeable improvement in handling for many applications, and the high travel design means you get more suspension movement before bottoming out. This makes them a popular choice for builds where suspension responsiveness is key.