Harvey Racing, LLC

10/01/2026

I got a couple of E30 S54 harnesses finished. These are for early models. One has the D100 diagnostics port option.

09/20/2026

A client sent me these photos of one of their S54 swaps using my E36 CANbus adapter harness. Pretty sick build. 👌

09/16/2026

I finished my first S54 harness since my running accident. Thank you so much for your patience if you’re still waiting for your order. They’re coming!

08/06/2026

08/06/2026

My girl Mei is stoked about these two E36 M3 S54 CANbus adapter harnesses! 🇺🇸

08/06/2026

My helper Cookie says he gives these two E30 M3 S54 adapter harnesses two paws up! 🐾 🇺🇸

07/03/2026

This is a CSL MAP & IAT adapter I made that a client requested. I can make more if you need one. I use genuine Bosch connector for the MAP sensor and genuine Kostal connector for the IAT sensor. The MAF connector is only available from China and I wasn’t sure what pins it uses, so the client sent me an adapter that includes it from Turner Motorsport. Now I know which pins it uses so I could order some from China. I replaced the wiring and pins since whoever is making them for Turner is using cheap Chinese stuff. For pricing I think $100.

07/02/2026

I’m able to offer S54 SMG to manual harness conversion for just $200.

06/17/2026

Who can make 3 S54 adapter harnesses at the same time?? Andrew can! 🙂 One of them even has the Z3M connectors! I can source them for just $40 extra.