LT1 Optispark Distributor

The Summit Racing LT1 Optispark Distributor is engineered as a robust replacement for your LT1 engine's original Optispark system. It is designed as the Optispark II vented, pin drive style OEM replacement. This unit boasts an aluminum housing, complemented by heavy-duty oilite bushings for durability. The glass-reinforced cap offers high dielectric strength, and it is fitted with aluminum terminals. Featuring an optical trigger and electronic advance, this distributor is built to provide reliable ignition timing. It is specifically designed for 5.7L LT1 engines. Applications include Buick, Chevy, and Pontiac vehicles equipped with the LT1 5.7L engine. It is important to note that this distributor has specific fitment limitations. It does not fit a stock 1997 Pontiac Firebird Formula, as confirmed by fitment checks.