Sealed Power Hypereutectic Piston - 3.907 in Bore - 1.50 x 1.50 x 3.00 mm Ring Grooves - Coated Skirt - GM LS-Series (Set of 8) R01J003S Bump Springs are used in LWILK5000K Size:Large (17") see 450600 R03P003L

Bump 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

Features Twin 4

Backed by a limited lifetime warrantyGreat looking

Spray Nozzle Included

2017-2017 BMW M240i xDrive

Sealed Power Hypereutectic Piston 3.907 in Bore 1.50 x 1.50 x 3.00 mm Ring Grooves Coated Skirt GM LS Series (Set of 8) R01J003S Bump Springs are used in LWILK5000K Size:Large (17") see 450600 R03P003L Bump 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 Features Twin 4