MAS Ignition Distributor for LT1 5.7L V8 Chevy Camaro Corvette Buick — Cap & Rotor Included, OEM-fit Replacement

The MAS Ignition Distributor assembly replaces the Optispark LT1 distributor and comes complete with cap and rotor for direct fitment on many 5.7L V8 GM vehicles.

If your LT1-equipped Chevrolet, Pontiac or Buick with a 5.7L V8 needs a reliable distributor replacement, this MAS unit is built to match OEM form, fit and function. It ships with the distributor body, cap and rotor, and the electronic module components are put through computer tests before and after assembly to help ensure consistent performance and compatibility with the factory ignition system.

Which vehicles will this MAS distributor fit?

This replacement is designed for late‑model LT1 V8 applications. It fits specific GM models from the mid‑1990s that originally used the Optispark-style distributor. Verify vehicle year, make and engine before purchase to confirm fit.

• 1994–1996 Buick Roadmaster and Fleetwood
• 1994–1996 Chevrolet Caprice and Impala
• 1995–1997 Chevrolet Camaro and Pontiac Firebird
• 1995–1996 Chevrolet Corvette (5.7L V8)

How does this part match OEM standards?

The MAS distributor is manufactured to meet original equipment specifications and is cross‑referenced to common OEM part numbers. Electronic modules inside are computer‑tested before final assembly and again after assembly to reduce the chance of out‑of‑box failures.

• Cross‑references: DST109, KA‑GM8381
• Hollander and legacy numbers included for fit verification
• Pre‑ and post‑assembly electronic testing for quality control

What comes in the box and what should I expect during installation?

The MAS package contains the distributor assembly with a matching cap and rotor, ready for swap‑in replacement. Installation typically follows the same procedures as the original Optispark unit — align timing marks, torque the mounting bolts, and reconnect wiring and vacuum lines as applicable.

• One MAS Ignition Distributor assembly
• Included distributor cap and rotor
• One‑year replacement warranty for peace of mind

Will this reduce troubleshooting time or improve reliability?

Replacing a worn or failing distributor with a properly matched MAS unit can eliminate ignition misfires, rough idle and hard starts caused by distributor wear or module faults. Because it meets OEM specifications and includes tested electronics, it’s intended as a like‑for‑like replacement to restore expected ignition behavior.

• Direct OEM fit avoids modification or adaptation
• Tested electronics help minimize immediate post‑installation failures
• Comes with cap and rotor to address common wear items at once

Who is this for: Technicians, home mechanics and classic LT1 owners who need a dependable, direct‑fit distributor replacement for mid‑1990s GM 5.7L V8 vehicles. Choose this MAS Ignition Distributor when you want a complete cap-and-rotor swap that aligns with OEM part references and includes a one‑year replacement warranty.