Rated up to 6000 RPM. 8620 Chrome Molly Steel Body for long life usage. Steel wheel withstand tough impact, high RPM, and 300 lbs spring pressure. Machine center finish for precision outside diameter. Nti Pump Up allow engine reach maximum RPM.
"Pump Up" to match Camshaft profile. SBC GM /Chevy 305 /350 /LS1, OEM Hydraulic Roller Cam & Lifters,'87-99.Push Rods for New Lifters. This is Rule of Thumb, whenever install new Camshaft, Rocker arm, and Lifter on your engine, you shall also replace with new push rods at exact length. Item must be in the original box, all items in the box.