MAS Performance Ignition Distributor for Chevy/GM SBC & BBC 65kV — Cap & Rotor, 7,500 RPM

MAS Performance Ignition Distributor with cap and rotor is a direct-fit replacement for many Chevy/GM small- and big-block V8 engines, delivering high-voltage spark up to 65k and reliable operation to 7,500 RPM.

This distributor assembly is designed as a like-for-like replacement for a range of Chevrolet/General Motors V8 engines, including small-blocks (305–400) and big-blocks (396–454). It ships with a matching cap and rotor and uses hardened 20CR steel gears for improved wear resistance. The unit meets common OEM fit and function expectations and is built with quality control and a one-year warranty for added buyer protection. Before ordering, compare the photos and fitment details to your original part to confirm compatibility with your vehicle.

Will this distributor fit my Chevy small- or big-block engine?

The MAS distributor is intended to be compatible with many Chevy/GM engines, including SBC series 305, 307, 327, 350, and 400, plus big-block 396, 427, and 454 applications. Fitment can vary by year and accessory configuration, so physical comparison is recommended.

• Designed for Chevrolet small-blocks and big-blocks listed in fitment details.
• Includes cap and rotor sized to common HEI flange patterns.
• Compare rotor length, gear type, and mounting flange to original part.
• Check distributor shaft orientation and vacuum advance (if applicable).

How does the MAS unit perform under higher RPM and ignition demands?

This distributor supports coil output capable of up to 65,000 volts and is rated for reliable spark delivery up to 7,500 RPM—suitable for many performance and street applications. The construction targets consistent spark timing and robust ignition energy for typical gasoline engines using HEI-style systems.

• High-voltage coil compatibility for stronger spark and stable combustion.
• Rated operation to 7,500 RPM for spirited driving and light performance use.
• Cap and rotor matched to maintain correct spark sequence and dwell.
• Built to reduce misfires from worn or fatigued OEM distributors.

What are the durability features and materials used?

MAS uses specially treated 20CR steel for the driven gears to enhance hardness and wear resistance compared with untreated components. Assembly follows quality-control checkpoints and the product is offered with a one-year limited warranty to address manufacturing defects.

• 20CR steel gears treated for improved longevity under load.
• Full cap and rotor included to replace worn ignition tops and contacts.
• Manufactured to meet common OEM dimensional standards for straightforward replacement.
• Backed by a one-year warranty covering defects in materials and workmanship.

How should I verify compatibility before purchasing?

Because distributors vary by model year and factory options, visually comparing the MAS unit to your existing distributor is the safest way to confirm fit. Check the pictures provided, your vehicle's service manual, and the fitment notes to avoid returns.

• Match mounting flange shape and bolt hole pattern to your engine.
• Compare gear spline count and shaft length to your original distributor.
• Verify cap terminal layout and vacuum advance style if applicable.
• Use part numbers and vehicle year/engine data to cross-reference fitment.

Who is this for: The MAS Performance Ignition Distributor is aimed at owners and mechanics replacing a worn or damaged HEI-style distributor in classic and late-model Chevy/GM V8s who want an affordable, robust replacement. It suits street drivers, restoration projects, and light performance builds that need a dependable, OEM-dimensioned distributor with improved gear durability and higher-voltage ignition capability.