Landrum ST Series Bump Spring - Gunmetal Gray - 1.96" OD x 2.152" Tall - 7000 lb. R07C09M NOTE: The 20-121 is not

NOTE: The 20-121 is not designed for use with some early model Holley carbs

Soft and comfortable

OR Drag Race: 3500-4000 stall or 4 speed with 11:1+ compression

Nozzle sizes

Landrum ST Series Bump Spring - Gunmetal Gray - 1.96" OD x 2.152" Tall - 7000 lb. R07C09M NOTE: The 20-121 is notBump Springs are used in conjunction with a primary spring to allow a race car to have a relatively soft 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 dynamic ride height. Consistent Performance and Reliability Landrum Performance Springs give you the consistent high performance and reliability you need. We use state of the art designs, materials, and