ACCEL 31035 Adjustable Vacuum Advance for GM HEI Distributors
Brand: ACCEL
Boosts power and delivers instant throttle response for engines with HEI distributors
Provides maximum spark with no harmful pinging or detonation
Both the rate and the amount of advance are infinitely adjustable
Backed by a limited one year warranty
Comes with detailed easy to follow instructions and the Allen wrench you need to make adjustments