MAS Ignition Distributor for LT1/Optispark 5.7L V8 — Complete Assembly with Cap & Rotor (1994–97)

MAS Ignition Distributor with cap and rotor is a direct-fit replacement for LT1/Optispark V8 5.7L engines, restoring timed spark for Chevrolet, Buick and Pontiac models from the mid-1990s.

When an aging Optispark distributor starts causing misfires, stalling or erratic idle, swapping in a complete MAS distributor assembly (cap and rotor included) returns reliable ignition timing and eliminates the time-consuming diagnosis of individual ignition components. This MAS unit is built to match OEM dimensions and electronic specifications for 1994–1997 GM LT1 platform vehicles, providing a straightforward replacement without the need for extra modifications or expensive dealer parts.

Which vehicles and part numbers is this MAS distributor compatible with?

This MAS distributor is made to fit a range of mid-1990s GM models using the LT1/Optispark ignition layout. It is matched to common OEM reference numbers so you can cross-check fitment before ordering.

• Vehicle fitment: 1994–96 Buick Roadmaster, 1994–96 Fleetwood, 1995–97 Chevy Camaro, 1994–96 Chevy Caprice, 1995–96 Chevy Corvette, 1994–96 Chevy Impala, 1995–97 Pontiac Firebird.
• OEM cross-references: DST109, KA-GM8381 and Hollander references 606-02339, 84-1833, 30-1833, 1103916, 01104032, 1104032.
• Supplied as a complete assembly with cap and rotor for direct swap-in compatibility.

How does the MAS distributor match OEM quality and electrical performance?

MAS manufactures this distributor to meet key OEM standards so electrical timing and mechanical fit align with factory expectations. Components are circuit-tested before and after assembly to ensure the module and internal electronics operate within specification.

• 100% compatible with OEM dimensions and mounting points for proper alignment.
• Electronic module and internal components computer-tested pre- and post-assembly.
• Includes cap and rotor matched to the distributor to avoid mismatched parts causing misfires.

What do I get in the box and is installation straightforward?

The package contains the MAS ignition distributor preassembled with its matching cap and rotor, ready for installation. For a mechanically competent DIYer or a technician familiar with LT1/Optispark systems, the swap is a standard replacement requiring basic tools and timing re-check.

• Box contents: MAS ignition distributor assembly with cap and rotor included.
• Installation: direct-fit replacement—no custom machining or extra parts typically required.
• Post-install: verify ignition timing and clear any stored engine codes after swap.

What warranty and support does MAS provide?

MAS supports this ignition distributor with a one-year replacement warranty, giving short-term protection against manufacturing defects. This warranty helps ensure you receive a functioning replacement if the part fails under normal use during the warranty period.

• Warranty: one-year replacement coverage from date of purchase.
• Quality assurance: parts are tested electronically during production to reduce early failures.
• Compatibility guidance: verify vehicle year and OEM numbers before purchase to ensure fit.

Who is this for: Technicians, DIY enthusiasts and fleet managers working on mid-1990s GM LT1 V8 vehicles who need a reliable, direct-fit distributor replacement. If you’re troubleshooting repeated misfires, rotor/cap wear or intermittent ignition issues on compatible Chevy, Buick or Pontiac models, the MAS Ignition Distributor with cap and rotor provides a ready-to-install solution backed by OEM compatibility and a one-year warranty.