MSD 84742 GM Crate Engine Ignition Kit with Pro-Billet HEI Distributor & 8.5mm Wires

The MSD 84742 GM Crate Engine Ignition Kit provides everything needed to fire up a new GM crate engine with proven MSD performance components. This all-inclusive ignition kit centers around the MSD Pro-Billet HEI Distributor (PN 8365), ideal for applications with sufficient clearance to take advantage of an internal coil and large distributor cap, delivering strong, consistent spark from idle to redline.

Paired with a universal 8.5mm Super Conductor spark plug wire set featuring 90° plug boots and 90° distributor boots, this kit is designed to work with late-model HEI-style distributor caps. The Super Conductor wire construction minimizes electromagnetic interference (EMI) while maximizing energy delivery to each cylinder.

Kit Includes:

• MSD Pro-Billet HEI Distributor (PN 8365) — Replaces GM HEI distributors using a 4-pin ignition module; features internal coil and large distributor cap
• Universal 8.5mm Super Conductor Spark Plug Wire Set — 8-cylinder set with 90° plug boots and 90° distributor boots and terminals
• MSD Pro-Clamp Wire Separators — Keeps plug wires organized and routed away from engine heat sources
• CNC-Machined Billet Steel Distributor Hold-Down Clamp — Precision-fit clamp designed specifically for MSD's Billet Distributor line

This kit carries a CARB Executive Order (EO) number, making it legal for sale and use on emissions-controlled vehicles in all 50 states when used per the manufacturer's application guide. It is a complete, ready-to-install ignition solution for GM small block and big block V8 crate engine builds.