GM fuel injection wiring harness stand alone harness LS1 LT1 LS6 tuned port aftermarket wiring harness pcm programming LS1 engine swap Vortec engine harness best top rated hot rod wiring harness 8100 Vortec wiring complete
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424 223 3366

Please allow about 3 weeks for delivery


​Fuel Injection Wiring Harnesses Made Simple.

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Wiring Harnesses for Fuel Injected GM / Chevrolet engine swaps - Stand Alone Wiring Harness for Gen I small block Fuel Injection, Gen II, Gen III and Gen IV LS-3 and Vortec V8 applications -  Throttle Body, Tuned Port, LT-1, LS-1 and Ls-x Vortec Fuel Injected engines, including  LS-2, LS-6, 5.7 and 6.0, and 4.8 / 5.3 / 6.0 / 8.1 Vortec, and Direct Injection GM car, truck and SUV engines, 2014 to 2020. Harnesses are Custom Made for engines using Computer Controlled transmissions, automatic 4L60E / 4L80E and Allison Automatics, and any Manual Transmission. We have a solution for most combinations. We can rework your OEM Electronic Transfer Case Harness into a Standalone Harness.
We offer Computer (PCM) Programming. It's usually required for most applications. Call for expert tech advise, we can help you with your project. 

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Our Harnesses come with all connections clearly labelled, for easy, intuitive installation.

This is simple!

Each harness is Custom Made per order, and all unnecessary peripheral /smog related components have been removed. 


The engine harness has only 4 wires to connect - Battery, Ignition, Ground and Fuel Pump. Electrical connections to your project are: Battery, Ground, Ignition, and Fuel Pump. Connect these 4 wires, and your engine will run. 

Our Engine Wiring Harnesses include an Engine Management Fuse Block and necessary Relays. 
These are the Wiring Harnesses that we use on our Customer's Cars in our Southern California shop.


Computer Outputs  include an OBD II Diagnostic Port for LS based engines, or a scanner port for LT1 and earlier, an electronic Vehicle Speed signal, a Tachometer signal wire, and where appropriate, Converter Unlock.
We include alternator wiring in post 1999 applications (excluding black Vortec 4.3/5.7 PCMS), and a Check Engine light installed in your Data Port bracket.
Wiring for oil and temp gauges, starter solenoid, and A/C compressor can be included, so you don't have to run a sub harness for these functions.

Mesh Wrap is included standard on car based harnesses. Vortec harnesses are encased with Split Loom Wrap, but can be optioned with Mesh Wrap.
  
All harnesses measure aprox. 36 inches from the Rear Injector Plug to the PCM. Custom lengths are available, up to 4' at no additional charge. Our harnesses are unparalleled for ease of installation, and are Quality Tested before they are shipped. They are professionally constructed, made specifically for your project, and come with unlimited  tech support should you need help.



We ship World Wide. 

 CALL 424 223-3366 TO ORDER , or to discuss your project.

                                                                          
Click HERE to find your Harness
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Engine Harnesses

Complete Body Wiring Harness

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If you're going to rewire your project from headlights to tail lights, look at our complete Body Wiring Harness. It interfaces easily with our Engine Harnesses, so your wiring couldn't be simpler. $145.00

Click HERE for Body Harness
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Customer Joe Kugel's LT-1 powered '32 Ford Roadster
HotRodHarness.com
571 S Cypress St
La Habra California 90631


424 223-3366

Fuel Injected Engine Swaps    Full Injection Harnesses   OBD II Diagnostic Port for LS based engines or a scanner port for LT1    

Complete Body Wiring Harness California, los angeles, san diego, sacramento, san francisco 

Hot Rod Harness
571 S Cypress St
La Habra CA 90631

8:00 am - 6:00 pm Monday thru Friday
9:00 am - Noon Saturday

424 223 3366: Sales
424 223 3366 ext 101: Tech Support

​hotrodharness@gmail.com



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