Competition Cams 1585316 SBC Short Travel Lifter For Small Block Chevy engines with OE flat tappet camshaft .005 inches recommended preload .842 inches diameter; 152 gram weight; 2.66 inches seat height Limits the lifters internal piston movement for increased durability & performance at higher rpm REM-surfaced and black oxidized to reduce valve train friction, wear and lubrication temperatures