MAS HEI Distributor Kit for Mopar V8 273-360 — Red Cap, 65K Coil & Performance Wires

MAS Red Cap HEI Distributor kit is a complete replacement ignition solution—distributor, high-performance spark plug wires and a free pigtail—designed to fit classic Chrysler, Dodge and Plymouth V8 engines (273, 318, 340, 360).

This all-in-one HEI kit from MAS brings together a tuned-capacity distributor, a 65K coil-rated red cap and a matched set of performance spark plug wires to simplify swapping into older Mopar V8s. The package includes components engineered for durability—heat-resistant wires, a treated-steel drive gear and a replacement pigtail—so you can restore reliable ignition without sourcing parts separately. It’s intended for direct-fit service on numerous late 1960s through 1980s Chrysler-group vehicles where the original HEI system is used.

Which engines and cars will this MAS HEI kit fit?

This kit is built for small- and big-block Mopar V8s including 273, 318, 340 and 360 cubic-inch engines. Fitment spans many Chrysler, Dodge and Plymouth models across the 1970s and 1980s—trucks, sedans and vans—where original HEI distributors were specified.

• Compatible with V8 engines: 273, 318, 340, 360.
• Direct-fit for a wide range of Chrysler, Dodge, Plymouth models from early 1970s through late 1980s.
• Replacement part number cross-reference: 843890.

How durable and reliable are the mechanical components?

MAS uses a hardened 20CR steel for the distributor drive gear to resist wear under continuous rotation and load. The wires are made with materials selected for heat tolerance and insulation longevity, and the distributor cap and coil are constructed to handle elevated coil output without premature breakdown.

• 20CR treated steel drive gear for improved wear resistance.
• Heat-resistant spark plug wires with high-dielectric insulation.
• 65K-capable coil and red cap matched to the distributor for consistent spark delivery.

Can this kit support higher RPM use and modern ignition demands?

This MAS HEI kit is built to perform at elevated engine speeds and deliver stable spark timing up to the specified RPM range. While it’s designed as an OEM-style replacement, its coil and wire package provide margin for spirited driving and higher-rev applications commonly used in restored or mildly modified Mopar engines.

• Rated performance up to 7,500 RPM under typical operating conditions.
• Matched coil and wires reduce misfire risk at higher engine speeds.
• Includes a free pigtail for straightforward electrical connections.

What comes in the box and what warranty covers it?

The kit ships with the MAS RED cap HEI distributor, a complete set of spark plug wires for a V8, a coil-cap assembly, and a complimentary pigtail to adapt to original wiring harnesses. MAS backs the kit with a one-year warranty to protect against manufacturing defects.

• Complete HEI distributor ready to install.
• Performance spark plug wire set sized for V8 routing.
• Free pigtail included for easy plug-in compatibility.
• One-year manufacturer warranty on parts and workmanship.

Who is this for: Mechanics, restoration enthusiasts and weekend wrenchers restoring Chrysler, Dodge or Plymouth V8 vehicles who want a single, matched ignition package to replace worn or unreliable original HEI components. If you need a drop-in distributor and wire set that combines classic fitment with upgraded materials and a straightforward installation, this MAS kit provides the parts and the warranty coverage to get older Mopar motors back to dependable starting and running behavior.