Distributor Vacuum Advance for 1988-1990 Chevrolet C1500 & More - Accel 31035

Dial in your ignition timing with the ACCEL adjustable vacuum advance (P/N 31035), a direct-fit replacement designed for GM HEI distributors equipped with a vacuum advance. It drops onto a wide range of 1975-1990 GM V8 applications — including the Chevrolet C10, C20, Camaro, Caprice, Monte Carlo and El Camino, plus Buick, GMC and Oldsmobile models — covering the V8-4.3L, V8-4.4L, V8-4.9L, V8-5.0L, V8-5.7L, V8-6.6L, V8-7.4L and V8-7.5L engines. See the Buyer's Guide tab for the full 423-application list.

A vacuum advance mechanically advances ignition timing in response to engine vacuum for smoother part-throttle operation. This adjustable unit lets you tune both the amount and the rate of advance to suit your engine.

• Wide-range adjustment: tune the amount and rate of ignition advance for your setup.
• Performance-minded: designed to help increase horsepower and throttle response while providing maximum spark advance intended to help prevent detonation or "pinging."
• Tuning kit included: comes with an Allen wrench and instructions for easy adjustment.
• Build: steel construction with a silver finish; made in the United States.