This Oldsmobile camshaft thrust kit is designed to fit a variety of Oldsmobile engines including the 307, 330, 350, 403, 400, 425, and 455. Made specifically for Oldsmobile vehicles, this kit ensures proper camshaft performance and engine functionality. As a genuine Olds Rocket Parts product.  This thrust kit eliminates cam walk . It also helps prevent wear between the camshaft and block . It also comes with crank spacer for proper gear alignment on timing chain gears . Although we recommend for all camshafts , This product is a must for roller cams . Remember this setup must be checked to get about .010 to .015 space between button and timing cover.