Universal Race Car UZ V8 Full Harness
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Tweak'd Universal Race Car UZ V8 Full Engine Wiring Harness 1UZ 2UZ 3UZ


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Tweak'd Universal Race Car UZ V8 Full Harness

  • $1,195.95
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  • Weight
    5 lbs
  • SKU
    XAT-V8-Tweakdharness

Finally, a full harness for your V8 swap to make things much easier! We've done more than a few over the past decade, and now we're teaming up with the renown Dr. Tweak to offer a top shelf harness and their lifetime warranty! 

These harnesses are all custom made for each individual application, so in many cases, we will need a core harness to start with. If you need a chassis specific harness, please contact us and expect it to be an extra $200-$400, depending on the chassis. 

Please contact us and let us know directly what your application will need regardless, and we'll be happy to get another UZ powered vehicle out there tearing it up!! As of right now, we only have support for automatic transmissions if you run the factory ECU for them. Standalone applications will require a dual ECU setup in most newer 1998+ chassis'

  • Engine
    1UZ, 2UZ, 3UZ
  • VVT-i
    No, Yes
  • Throttle
    Cable Actuated, Electronic DBW
  • Transmission Type
    Manual Nissan Z 6 Speed, Toyota Automatic (ECU must match trans), Unlisted (Contact us), Manual R154, Manual V160, W55/W58, KA/SR Nissan 5 speed
  • Alternator Plug
    Round, Oval
  • Engine Management
    Factory ECU, Haltech Elite 2500, Haltech PS2000, AEM Infinity 708 / 8, AEM Infinity 508 / 8h, Other aftermarket EMS (contact us), AEM Infinity 506 / 6, ProEFI 128, LinK G4+ Xtreme, LinK G4+ Storm, LinK G4+ Thunder
  • Starter Plug
    Square (older), Round (newer)
  • MIL-Spec Firewall Connector
    Tweak'd anodized plate and grommet, MIL-SPEC connector and plate (manual trans only), No, Reuse firewall bulkhead grommet
  • Loom Type
    Standard (Braided pigtails with split braided on main loom), Full braided sleeving (non serviceable)
  • Injector Type
    High Impedance, Aftermarket Square Bosch, low impedance, Aftermarket Square Bosch, high impedance, Low impedance
  • Coil Pack/Ignition
    AEM Smart Coils, Other, Factory, 1ZZ Toyota Smart Coils, GM LQ9/LS2/LS3 Smart Coils
  • MAP Sensor Type
    OEM Plug, Aftermarket, AEM
  • IAT Sensor Type
    Aftermarket, AEM, OEM Plug
  • O2 Sensor Type
    Toyota 3 Pin, Toyota 4 Pin, AEM Wideband, Bosch LSU4.2/4.9 Wideband
  • TPS
    Factory (matches throttle body), Q45 TPS w/Nissan 3 pin Plug, Q45 TPS w/GReddy adapter
  • Temp Sending Unit
    Universal 2 wire unterminated, Round Plastic, Metal Spade, Use original from supplied core
  • Oil Sending Unit
    Round Plastic, Metal Spade, Use original from supplied core, Universal 2 wire unterminated
  • Boost Control Solenoid
    No, Yes, weatherpack 2 pin
  • Fuel Pressure
    No, Yes, 3 pin psi sensor
  • Oil Pressure
    Yes, 3 pin psi sensor, No
  • Clutch Pressure
    No, Yes, 3 pin psi sensor
  • Exhaust Backpressure
    No, Yes, 3 pin psi sensor
  • Coolant Pressure
    Yes, 3 pin psi sensor, No
  • Flex Fuel
    No, Yes, Continental sensor, Yes, ProEFI sensor 4 pin
  • Cam/Crank Sensors
    SRT/Hall Effect, Factory Toyota
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Most product ships from either the manufacture or largest wholesale location to pass the saving to you. Most orders will ship via UPS, as we will be able to provide the best rates and have had the least issues when using UPS.


IF YOU DO NOT LIKE THE AUTOMATED SHIPPING CALCULATOR'S RATES, PLEASE CONTACT US AND WE CAN GET YOU A BETTER ONE! Especially for anyone outside the USA, please contact us with a list of parts you'd like to order, and where you are located.

We accept the following payment methods:

Also Venmo and unmarked nonsequential dollar bills

Refund, Returns and Cancellation Policies: all returns are subject to the restocking fee as per the provider of the part. Engine internals are non-returnable due to their nature.

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