Cam Thrust Plates (5pk) SBC 305/350 4.230

The Cam Thrust Plates (5pk) SBC 305/350 4.230 by ENGINEQUEST are essential wear components that control axial movement of your small-block Chevy camshaft. During engine operation, the rotating camshaft generates thrust loads that push forward and backward; without proper restraint, excessive end-play can cause valve timing to drift and lead to catastrophic engine damage. These five-piece plates fit both the 305 and 350 cubic-inch variants and maintain the critical 4.230-inch dimension your engine requires for proper cam clearance and longevity.

Manufactured by ENGINEQUEST, a trusted name in small-block rebuild kits and components, these thrust plates are precision-engineered to OEM specifications and hold tight tolerances that prevent slop between the camshaft and block. The 4.230-inch dimension is the standard bore-to-bore measurement for SBC 305/350 applications, ensuring they seat properly in the front of the block where they support the cam gear or reluctor wheel. A five-pack quantity allows you to replace worn or damaged plates during a full engine rebuild or to stock spares for future projects—a smart move for any serious small-block enthusiast doing their own machine work.

These thrust plates are mandatory during any SBC cam installation, engine refresh, or performance build where the block has been bored or faced. If you're replacing a worn cam or upgrading to a performance grind, new thrust plates ensure you eliminate end-play and maintain precise valve event timing—critical for carburetor tuning, fuel-injection calibration, and ignition timing accuracy. Installation is straightforward: position them against the camshaft shoulder in the block's front bore before installing the cam gear retaining bolt. Whether you're rebuilding a stock 350, hopping up a 305, or preparing a 4.230-bore block for a fresh engine, ENGINEQUEST's five-pack delivers the quality and quantity you need.