Tune your GM HEI advance curve to make more power with Mr. Gaskets GM HEI advance curve kit. Kit includes weights, center plate, nylon bushings, & various springs to fine to your timing curve to make your engine run its best.
Light Springs - Black
Medium Springs - Silver
Heavy Springs - Gold
Advance Curve Kit - GM HEI Distributor
Part #: 929G- Length: 0.9"
- Width: 2.9"
- Height: 5.8"
- Emissions Code: 3
- Prop 65: No