MAS Performance HEI Distributor for Chevy V8s – Red Cap with Wiring Kit & 65K Coil Compatibility

This MAS Performance HEI distributor replaces aging original equipment units for Chevrolet and GMC small-blocks (262–400) and big-blocks (402–454). It includes a red-cap distributor, wiring harness, and is designed to work with high-output 65K ignition coils. The assembly combines durable steel gears and modern electrical components to restore reliable spark and simple swap-in installation for a wide range of classic and truck applications.

What makes this MAS HEI distributor a direct swap for older Chevy V8s?

The MAS unit maintains factory mounting dimensions, shaft height, and gear profile so it lines up with stock oil pump drives and timing covers. Internal pickup and cap tower spacing follow OE HEI geometry, allowing it to replace common GM part numbers without extensive modification.

• Fits SBC and BBC applications (262, 267, 305, 307, 327, 350, 400, 402, 454).
• Compatible with many Chevrolet, GMC, Oldsmobile, Pontiac and Buick models.
• OE-style shaft and vacuum/centrifugal advance compatibility for straightforward installation.

How does the included wiring kit and 65K coil compatibility help performance?

The wiring kit supplies the proper plugs and connectors to integrate the MAS distributor with factory or aftermarket ignition systems. Compatibility with 65K coils means the distributor’s module and wiring are rated for higher secondary voltage, useful when upgrading to a hotter coil for improved ignition energy.

• Wiring harness sized for HEI module and coil connections.
• Works with high-output 65K coils when used within recommended specs.
• Includes 90-degree boots for tidy spark plug routing in tight engine bays.

Are the internal parts durable enough for daily driving and restoration projects?

MAS uses specially treated 20CR steel for the drive gears, giving enhanced hardness and wear resistance versus untreated alloys. The robust gear and bearing choices are intended to extend service life under normal operating loads, reducing the chance of premature wear in older engines.

• 20CR steel drive gears for greater wear resistance.
• Quality bearings and seals to maintain shaft alignment and oil control.
• One-year limited warranty for replacement against manufacturing defects.

What installation tips should I know before swapping this distributor?

Set the engine to top dead center (TDC) on the compression stroke for cylinder one and match rotor position before lowering the distributor into place. Verify timing and centrifugal/vacuum advance operation after installation and use the wiring kit to ensure secure, weather-tight connections.

• Align rotor to TDC mark before installation to minimize timing adjustments.
• Torque mounting bolt and verify gear mesh with oil pump drive per service specs.
• Check advance mechanism movement and secure wiring with supplied connectors.

Who is this for: The MAS Performance HEI distributor assembly suits restorers, truck owners, and performance hobbyists who need a reliable OE-form replacement for Chevrolet and GMC small- and big-block V8s. It’s ideal when upgrading to a higher-output coil, repairing a worn distributor, or performing an engine refresh on classic cars, pickups, and vans that originally used GM HEI systems.