RPM RC18T, RC18MT, RC18B and RC18R Wide Front Bumper, Black This RPM bumper is thicker than the stock version and wider for 3-5/16" of front-end protection The extra width of the bumper helps protect the fragile front shocks Our bumpers are not "bolt-on-over-the-stock" versions; our wide front bumpers completely replace the stock version RPM bumpers carry the RPM lifetime breakage warranty We've tightened the tolerances for less suspension slop while still maintaining free motion of the A-arms