MAS HEI Distributor Kit Red Cap for Chrysler/Dodge/Plymouth V8 (273/318/340/360) with Performance Wires & Pigtail

MAS Red Cap HEI distributor kit is a complete replacement ignition set that includes a high-output HEI distributor, performance spark plug wires, and a free pigtail for V8 Chrysler, Dodge, and Plymouth engines (273, 318, 340, 360).

This kit is built to restore reliable spark delivery for classic Mopar V8s across many 1970s and 1980s Chrysler, Dodge, and Plymouth vehicles. It combines a red-cap HEI distributor designed for higher coil voltage tolerance with matched spark plug wires and the necessary pigtail so you can replace the entire ignition top-end in one service. The kit is sold with a one-year warranty and is intended for engines that accept the HEI conversion and the compatible part number listed.

Which vehicles and engines does this MAS HEI kit fit?

This kit is engineered for a broad range of Mopar models that used small-block and related V8 engines from the 1970s through the 1980s. It covers popular V8 displacements including 273, 318, 340, and 360, and fits many Chrysler, Dodge, and Plymouth chassis listed in the fitment table. Always verify compatibility by year, model, and engine before ordering.

• Covers 1972–1989 model years across Chrysler, Dodge, Plymouth lineups.
• Designed for V8 engines 273, 318, 340, 360 with HEI-style installation.
• Cross-references part number 843890 for replacement compatibility.

How does this distributor assembly improve ignition performance?

The MAS HEI distributor provides a robust cap and rotor design to keep ignition timing and spark distribution accurate under load. The high-voltage red cap and matched wires reduce misfires and improve voltage transfer to the plugs compared with worn stock components. The included pigtail ensures a clean electrical connection to existing vehicle wiring harnesses.

• Red-cap HEI designed for higher coil voltage handling up to performance demands.
• Matched spark plug wires tuned for resistance and consistent firing order.
• Free pigtail for trouble-free harness connection and correct signal routing.

What materials and construction details should I expect?

Critical moving parts are manufactured using hardened 20CR steel for improved wear resistance and longevity inside the distributor drive. The rotor, cap, and wire boots are made from materials chosen to withstand heat and electrical stress typical of V8 engine bays. The wires use performance-grade insulation to help prevent arcing and radio-frequency interference.

• Distributor gears made from specially treated 20CR hardened steel.
• Durable cap and rotor materials selected for thermal and electrical durability.
• High-quality wire insulation to reduce arcing and maintain spark integrity.

What comes in the box and what warranty is provided?

The package arrives ready to install: a MAS red-cap HEI distributor assembly, a full set of performance spark plug wires matched to the firing order, and a free pigtail connector. MAS backs the kit with a one-year warranty covering defects in materials and workmanship to give you confidence after installation. Follow vehicle-specific installation steps and verify timing after fitting.

• Complete HEI distributor assembly with red cap and rotor included.
• Full set of performance spark plug wires sized for the V8 application.
• Free pigtail to connect to the factory harness and one-year limited warranty.

Who is this for: This MAS HEI distributor and wire kit is aimed at owners and mechanics restoring or maintaining classic Chrysler, Dodge, and Plymouth V8 vehicles who want a single-package ignition top-end replacement. It suits hobbyists rebuilding period-correct engines, weekend racers needing reliable high-voltage performance up to competitive RPM ranges, and professional shops performing tune-ups on vehicles that accept HEI conversions. Confirm your engine displacement and model year compatibility before purchase to ensure proper fit and function.