Access Door - Rev Limit Adjuster - 6425 Box

The MSD Ignition Access Door for Rev Limit Adjuster (Model 6425 Box) is an essential component for tuners and performance builders seeking precise control over engine RPM parameters. This access door provides direct access to the rev-limiting adjustment mechanism of the 6425 ignition box, enabling modifications to maximum RPM thresholds without disassembling the ignition box.

Designed by MSD Ignition, a trusted name in the industry for over four decades, this access door features a precision-molded design that integrates seamlessly with the 6425 ignition box housing. Its compact dimensions (1.25 x 0.95 x 4.05 inches) ensure it adds no bulk while providing protected access to the rev-limit adjuster potentiometer and related tuning circuitry.

Engine builders and shop mechanics utilizing the MSD 6425 ignition control system will find this access door invaluable during installation, dyno tuning, and track setup. It pairs directly with the 6425 box, maintaining compatibility while safeguarding sensitive electronics from accidental contact and environmental contamination.