Rywire

Building an engine swap or after a clean engine bay without a tangle of old wiring? Rywire makes wiring harnesses and electrical solutions for tuner and race cars. Here you’ll find engine harnesses, tucked harnesses for clean engine bays, adapter harnesses and accessories that make the electrics simpler and more reliable.

American harnesses for tuning and engine swaps

Rywire is an American brand specialising in wiring harnesses for performance cars. The brand is especially well known in the Honda scene, where engine swaps such as K-series conversions need a harness that suits both the engine and the car, but the range covers other popular platforms too. Rywire focuses on purpose-built harnesses, so the installation becomes clearer and more dependable than a modified factory loom.

Rywire’s key products

Engine harnesses are the core of the range, both for original engines and for swaps where engine and chassis were never meant to go together. Tucked harnesses are built so the wiring can be hidden, leaving the engine bay clean and tidy. Rywire also makes motorsport-grade harnesses, adapter harnesses for sensors and ECUs, and smaller sub-harnesses for items such as fuel pumps and fans. See each product for engine and vehicle fitment.

Buy Rywire from us

We specialise in performance parts and know what it takes for a project to succeed. You get a wide selection, competitive prices and personal service if you have questions along the way. Find the Rywire solution for your project and take the next step towards more performance.

Frequently asked questions

What is a tucked harness?

A tucked harness is made so the wiring can be routed out of sight, for example behind the fenders or into the cabin. It gives a clean engine bay, which many use on show and project cars, but it takes a little more planning to install.

Why use a ready-made harness for an engine swap?

A harness made for that exact engine and chassis combination saves many hours of cutting and adapting the factory loom. It also reduces the risk of faults that can be hard to trace later.