Looking for the best in aesthetics, weight savings and reliability out of your harness? Our Mega Harness completely replaces your old OEM harness so you can forget about those electrical gremlins.
This Wiring Specialties Mega Harness was designed from the ground-up to exceed OEM specifications for wire quality, power/ground routing. With our optimized and 'tucked' approach the end result will be a clean and worry free installation with a guaranteed start up.
This Wiring Specialties Mega Harness was designed specifically for a Toyota 1FZ engine swap. It was developed in house on an actual Toyota 1FZ engine to ensure a perfect fit to all engine connections.
Wiring Specialties offers a number of options for common performance upgrades for this product. Build your perfect harness by selecting from the available options to the right, and as always - if you have any questions, please reach out to us.