Hypercoils Bump Spring - 700 lb. MAC-2P-KIT Famed racers such as Bill

Famed racers such as Bill "Grumpy" Jenkins

1978-1982 Buick LeSabre

1970-1972 GMC Jimmy

16 Fins Per Inch Core -Allows more airflow to provide better cooling

Most Dirt Works

Hypercoils Bump Spring - 700 lb. MAC-2P-KIT Famed racers such as BillBump Springs are used in conjunction with a primary spring to allow a race car to have a relatively soft compliant initial spring rate to get down to the desired optimum ride height and then pick up the rate of the bump spring to achieve a constant optimum dynamic ride height. Key Benefits of Bump Springs HYPERCOILS because the most important race is the one you are in. Hyperco is a supplier of precision engineered, high performance suspension springs