Shim for CT 525 Flywheel

The Shim for CT 525 Flywheel by BRINN TRANSMISSION is a precision-engineered spacer designed for serious LS-engine builders and transmission specialists who demand exact clearance control in high-performance applications. This steel shim addresses the critical gap between flywheel and transmission bell housing, ensuring proper engagement and eliminating binding or excessive play that can compromise drivetrain integrity. Whether you're assembling a street performance engine, race-prepped vehicle, or custom powertrain, this shim is an essential component for achieving the tight tolerances that separate amateur builds from professional-grade installations.

Manufactured from durable steel in natural finish, the Shim for CT 525 Flywheel measures 0.030 inches thick—a standard thickness that bridges small dimensional gaps common in LS-series engine conversions and transmission swaps. The compact profile (5 x 0.25 x 5.5 inches) and minimal weight (0.07 lbs) mean it installs without affecting rotating mass or balance characteristics. Steel construction ensures this shim maintains its thickness under load and vibration, resisting compression or deformation over thousands of engine cycles—critical when transmission torque and engine harmonics stress the flywheel interface continually.

Mechanics and engine builders working with GM LS-series powerplants will find this shim invaluable during transmission installation, especially when adapting aftermarket flywheels or combining components from different model years. It's equally suited for custom LS swaps into classic vehicles or modern platforms where factory fitment tolerances don't align perfectly. Installation is straightforward—position the shim between flywheel and bell housing before bolting the transmission, then verify clearance with a feeler gauge. Stock this shim on your bench when tackling serious powertrain work; a 0.030-inch gap is often the difference between a smooth, long-lived drivetrain and one plagued by noise, slip, or premature wear.