MAS HEI Distributor w/ Cap & Rotor for Chevy SBC/BBC — 65kV Coil, 7,500 RPM Direct-Fit

MAS Performance Ignition Distributor w/Cap & Rotor is a direct-fit HEI replacement for Chevrolet small-block and big-block V8 engines that delivers up to 65kV ignition energy and is rated for safe operation to 7,500 RPM.

This distributor assembly from MAS is built as a complete replacement unit — cap, rotor and high-output coil — engineered to match original equipment dimensions and firing order for Chevy/GM SBC 305–400 and BBC 396–454 engines. It combines high-voltage output, hardened gear construction and OEM-style fitment so you can swap it into classic V8s or rebuild projects without extensive modifications. Before ordering, compare product photos and fitment information with your original parts to confirm compatibility.

Will this distributor fit my Chevy small-block or big-block V8?

Yes — the MAS unit is designed to be compatible with many Chevrolet small-blocks (305, 307, 327, 350, 400) and big-blocks (396, 427, 454). It follows OEM physical dimensions and electrical connectors where applicable for a straightforward replacement.

• Direct-replacement design for common SBC and BBC Chevrolet engines
• Compare photos and fitment notes to your original distributor before purchase
• Mounts and timing components match factory-style layouts for most applications

How does the MAS distributor improve ignition performance?

This MAS HEI-style distributor includes a high-voltage coil capable of delivering up to 65,000 volts to the plug leads, improving spark energy and consistency at higher RPMs. It is rated for dependable operation up to 7,500 RPM, which suits many street and light-performance V8 builds.

• Up to 65 kV coil output for stronger spark potential
• Operational rating to 7,500 RPM for stable high-rpm performance
• Complete cap and rotor included for optimized spark distribution

What construction and durability features does it offer?

Critical wear components are engineered for longevity: the distributor gears use specially treated 20CR steel for hardness and wear resistance, and the overall assembly is manufactured to meet OEM standards. MAS backs the product with a one-year warranty and controlled quality checks.

• 20CR steel gears heat-treated for strength and reduced wear
• Manufactured to OEM fit and performance standards
• One-year limited warranty and factory quality controls

How easy is installation and what should I check before buying?

Installation is straightforward when replacing a like-for-like HEI distributor: remove the old unit, transfer any necessary timing marks or modules, install the MAS unit and set ignition timing. However, verify mechanical fit, connector type and rotor rotation direction against your original distributor photos to prevent compatibility issues.

• Simple swap for compatible Chevy SBC/BBC HEI setups
• Inspect and compare product photos with your existing unit before ordering
• Set base timing after installation; confirm firing order and rotation

Who is this for: The MAS Performance HEI distributor is aimed at classic Chevy owners, hot-rodders and repair shops replacing worn distributors or building reliable performance engines. It suits restomod and street applications where OEM fitment, higher-voltage ignition capability and durable gear materials are required without extensive electronic modification.