HEI Tachometer Lead

The HEI Tachometer Lead by Painless Wiring is a critical ignition system component designed for hot rodders, classic car restorers, and performance enthusiasts running high-ignition distributors. This specialized lead bridges the gap between modern engine management demands and vintage or custom ignition setups, making it indispensable when converting or upgrading to HEI (High Energy Ignition) distributors on street rods, muscle cars, and race vehicles. Whether you're building a restomod or fine-tuning a carburetor-fed engine, this tachometer lead ensures accurate RPM signal transmission to your dash gauge.

The Painless Wiring HEI Tachometer Lead is engineered to provide a clean, noise-free signal from the distributor to the tachometer, eliminating the common electrical noise and signal loss that plague many aftermarket installations. This compact lead—measuring just 4.2 inches in length and weighing a mere 0.1 pounds—is lightweight enough to integrate seamlessly into tight engine bays while maintaining exceptional shielding and EMI rejection. The lead features robust construction with quality connectors and proper impedance matching, ensuring your tachometer displays precise engine speed regardless of ignition timing changes, engine load, or high-RPM operation on the dyno or street.

Installation is straightforward for any mechanic familiar with distributor wiring and basic engine bay layout. The HEI Tachometer Lead integrates seamlessly with Painless Wiring harnesses and is compatible with any standard tach gauge that accepts a distributor signal input, making it a bolt-on solution for engine swaps, performance upgrades, and full electrical system overhauls. If you're upgrading from points-and-plugs to an HEI distributor or troubleshooting tachometer dropout issues on a carbureted street machine, this proven lead eliminates guesswork and delivers reliable RPM readout at idle, cruise, and wide-open throttle.