BBC Stand Shim Kit .080/.040

The BBC Stand Shim Kit .080/.040 from T and D Machine is a precision rocker arm stand shim set engineered for small block Chevy and Ford engine builders who demand exact valve train geometry. This kit addresses a critical need in performance engine assembly: fine-tuning rocker arm stand height to achieve proper pushrod angles and eliminate binding or excessive clearance. Whether you're blueprinting a stock rebuild or optimizing a high-revving small block, shim selection directly impacts valve actuation reliability and engine longevity.

This kit contains sixteen shims at 0.080 inches thick and sixteen shims at 0.040 inches thick, machined from hardened steel to withstand repeated engine cycles without deformation. The dual-thickness design allows you to stack and combine shims for precise height increments, accommodating variations in deck height, block preparation, and aftermarket rocker geometry. Steel construction ensures durability under the constant compression and rotation loads of engine operation, while the compact 1.6 x 1 x 4.1-inch package keeps your build kit organized.

Professional engine builders, machine shops, and serious DIY enthusiasts benefit most from this shim kit when assembling or rebuilding small block Chevy or Ford engines. Proper shim selection prevents rocker arm misalignment, reduces wear on pushrods and valve stems, and ensures consistent valve timing across your engine. Installation requires removing the rocker arm stand and inserting shims between the stand and cylinder head until the correct pushrod angle is achieved—typically 1 to 2 degrees of angle for optimal performance. For any engine using adjustable rocker stands on small block platforms, this comprehensive shim set is an essential assembly tool.