Relay with Harness 30amp

The Allstar Performance Relay with Harness 30amp (ALL76186) is a 12-volt electrical relay designed for high-amperage automotive and motorsports applications. This complete relay kit includes pre-installed wiring harness, eliminating the need for custom fabrication and reducing installation time on race cars, hot rods, classic vehicles, and performance street machines.

Rated for 30 amps, this relay handles substantial electrical loads while protecting critical circuits through proper switching. The integrated harness provides a plug-and-play solution that maintains factory-quality connections without splicing or soldering, reducing failure points and ensuring consistent performance across engine starts and high-demand electrical scenarios. At just 0.21 lbs and compact dimensions (4.05 x 1.5 x 5.3 inches), the unit fits easily into tight engine bays or firewall locations typical of modern and vintage automotive builds.

This relay is ideal for builders upgrading fuel pumps, electric fans, lighting systems, or auxiliary ignition circuits where factory relays lack the amperage headroom. Allstar Performance's relay-and-harness kits are purpose-built for drag racing, circle track, and street performance environments where reliability under sustained load matters. The universal design allows integration into most 12-volt negative-ground systems, making it a versatile choice for custom automotive projects requiring proven electrical switching.

Whether you're upgrading cooling capacity on a high-output engine or adding aftermarket accessories, a 30-amp relay with pre-assembled harness simplifies wiring while meeting the electrical demands of modified vehicles. This part has become standard in performance shops and DIY builder communities where simplicity and reliability are equally valued.