Description
Mullins HEI Distributor Cap Clamp Kit – GM Style HEI Cap Lock System for Demo Derby
The factory spring tabs on GM HEI distributor caps were never designed for demolition derby abuse. Hard hits, engine movement, and constant vibration make the cap pop loose — leading to broken rotors, lost spark, and a dead car mid-heat.
The Mullins HEI Distributor Cap Clamp Kit is built to eliminate that common failure point.
🔧 Secure Your HEI Cap Under Impact
These clamp plates are designed to firmly secure your GM-style HEI distributor cap during intense, hard-hitting derby action. The stock four spring-loaded locking tabs simply do not provide a reliable connection in high-impact conditions. This kit replaces that weakness with a solid mechanical hold.
🔩 Kit Includes:
- Precision 3D printed PLA+ clamp plates
- (4) 1/4″ screws
- (4) lock nuts to resist vibration loosening
The included hardware ensures the cap stays firmly in place even under severe shock and movement.
🏁 Built for Demolition Derby Conditions
When an HEI cap pops off, it often results in:
- Broken rotor
- Lost ignition spark
- Engine stall
- Early DNF
This clamp kit prevents cap separation and helps protect your ignition system when it matters most.
🔥 Pair It for Maximum Reliability
For complete ignition security, pair this kit with the Mullins HEI Wire Retainer (sold separately). Together, they eliminate the two most common HEI ignition failure points in demolition derby — loose caps and loose wires.
If you run a GM HEI setup, this is cheap insurance that keeps your distributor cap locked down and your car running through the chaos.
Secure the cap. Protect the rotor. Stay in the fight.
