Landrum ST Series Bump Spring - Gunmetal Gray - 1.96" OD x 2.152" Tall - 7000 lb. R07C09M OR Drag Race: 3500-4000 stall

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

Soft and comfortable

Nozzle sizes

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

2015 Ford F-150 SuperCrew Cab Pickup

Landrum ST Series Bump Spring - Gunmetal Gray - 1.96" OD x 2.152" Tall - 7000 lb. R07C09M OR Drag Race: 3500-4000 stallBump 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