Flywheel Shim Kit .090 Thick - SBF 289-351W

The Competition Engineering Flywheel Shim Kit .090 Thick for Small Block Ford 289-351W engines is a precision-engineered solution for dial-in crankshaft endplay and optimize driveline geometry on stroker builds and performance applications. This set of three steel shims allows you to adjust the axial clearance between the flywheel and crankshaft, a critical step that many builders overlook but directly impacts clutch engagement quality, torque converter alignment, and overall drivetrain reliability.

Each shim measures 0.090 inches thick and is manufactured from hardened steel in a natural finish, designed to withstand repeated clamping cycles under high load. The small block Ford 289-351W platform is one of the most modified and turbocharged engines in hot rod, street performance, and vintage racing communities, making crankshaft endplay management essential when combining overbore blocks, stroker cranks, or heavy-duty clutch assemblies. These shims stack behind the flywheel to take up excess endplay that can cause clutch chatter, converter slip, or premature bearing wear on the crank snout.

Competition Engineering is recognized in the small block Ford community for producing bearing sets, gasket materials, and mechanical solutions that address the durability challenges of high-revving, highly modified engines. The 0.090-inch thickness is the industry-standard increment for fine-tuning crankshaft clearance, and having a matched set of three allows builders to stack shims in 0.090, 0.180, or 0.270-inch total increments to dial in specification endplay (typically 0.004–0.008 inches for street engines, tighter for racing). This kit is essential for any stroker build, big-block swap, or turbo SBF project where precise crankshaft positioning is non-negotiable.