Davis Unified Ignition D.U.I. GM Distributor Shim Kit

Davis Unified Ignition (D.U.I.) GM Distributor Shim Kit is designed for Chevy small block or big block engines that have been decked and/or heads milled, preventing the distributor from bottoming out on the oil pump. These shims are made of high impact nylon and are more durable and reliable than stacking gaskets. Includes 3 shims in .030?, .060? and .100? thickness.

Features:

Durable High Impact Nylon.

Prevents Gear Damage.

.030?, .060? and .100? Thickness Shims.

For GM Small & Big Block.