Cam Thrust Plates (5pk) SBF 289-351W

The EngineQuest Cam Thrust Plates (5pk) SBF 289-351W are essential engine internals designed to control camshaft endplay and prevent destructive axial movement in small-block Ford engines. If you're rebuilding or upgrading a 289, 302, or 351W engine, these precision plates are non-negotiable—they sit between the cam gear and cylinder head to maintain correct valve timing geometry and protect your newly machined block investment. Whether you're assembling a stock restoration or a high-RPM performance build, proper cam thrust control is foundational to engine longevity and reliability.

EngineQuest manufactures these plates to OEM-equivalent tolerances, ensuring tight clearances that eliminate excess play without binding the camshaft. The five-piece set allows you to dial in the ideal stack thickness for your specific block and head combination—critical when you're working with aftermarket heads or a ported/decked cylinder head. Each plate is hardened to resist wear under sustained high-RPM operation and properly finished to prevent galling against the cam lobes and head surface. This controlled endplay prevents cam gear rattle, maintains valve opening and closing points within specification, and protects your entire valvetrain from catastrophic failure.

Serious Ford engine builders—whether you're doing a period-correct 289 small-block or a stroker 351W project—rely on EngineQuest thrust plates during both stock rebuilds and aggressive performance combinations. Installation requires precise measurement with feeler gauges during assembly to confirm endplay falls within factory specifications (typically 0.006" to 0.010"). Compatible with all standard SBF 289-351W cylinder heads and blocks, these plates are a cost-effective insurance policy against internal wear and valve train instability. Keep a five-pack on hand for your next engine teardown or freshly bored block.