HCR DIY Kits & Custom EFI Wiring Harnesses

HCR InnovationsWant to wire your Holley EFI system yourself? Do it right with a pro level wiring harness kit from HCR Innovations. We’ve put together all the parts and tools you need to build your own harness with the best parts available.

We also sell Assembled Custom Built Harnesses for those that need one ready to go.

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