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Universal Race Car UZ V8 Full Harness

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

These are custom made to order. Expect to send in your original harness, and minimum of 10 week wait time.

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. Expect to need to send in your UZ harness, as well as your intended chassis' factory engine harness, depending on which it is. Connectors typically do not get reused from the original harness'; we just need them to verify connector type and length as the UZ engines have a variety of harness differences depending on year and 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'. On Toyotas specifically, the factory chassis ECU gets retained for MultiPlex compatibility, meaning the factory ECU will control the A/C, gauge cluster, throttle, auto transmission, ABS, etc. Feel free to reach out to us with what your swap is and we can make sure you get the right price and harness for your application!

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  • $1,395.95
    • SKU
    • Weight
      5 lbs
    • Dimensions (L x W x H)
      10 x 10 x 10 in
  • Engine
    1UZ, 2UZ non VVTi, 2UZ VVTi, 3UZ
  • VVT-i
    No, Yes
  • Transmission Type
    Manual Nissan Z 6 Speed, Toyota Automatic (ECU must match trans), Manual R154, W55/W58, Unlisted (Contact us), KA/SR Nissan 5 speed, Manual V160
  • Alternator Plug
    Oval, Round
  • 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
    Round (newer), Square (older)
  • MIL-Spec Firewall Connector
    Tweak'd anodized plate and grommet, MIL-SPEC connector and plate (manual trans only), No, Reuse firewall bulkhead grommet
  • Injector Type
    High Impedance factory style, Aftermarket Square Bosch, low impedance, Aftermarket Square Bosch, high impedance, Low impedance
  • Coil Pack/Ignition
    Factory, AEM Smart Coils, Other, 1ZZ Toyota Smart Coils, GM LQ9/LS2/LS3 Smart Coils
  • MAP Sensor Type
    OEM Plug/None, Aftermarket, AEM, Aftermarket, other (contact us)
  • IAT Sensor Type
    OEM Plug, Aftermarket, AEM
  • O2 Sensor Type
    Toyota 4 Pin, Toyota 3 Pin, AEM Wideband, Bosch LSU4.9 Wideband, Bosch LSU4.2
  • TPS
    Factory (matches throttle body), Q45 TPS w/Nissan 3 pin Plug, Q45 TPS w/GReddy adapter
  • Temp Sending Unit
    Use original from supplied core, Round Plastic, Metal Spade, Universal 2 wire unterminated
  • Oil Sending Unit
    Use original from supplied core, Round Plastic, Metal Spade, Universal 2 wire unterminated
  • Boost Control Solenoid
    No, Yes, weatherpack 2 pin
  • Fuel Pressure
    No, Yes, 3 pin psi sensor (aftermarket ECU only)
  • Oil Pressure
    No, Yes, 3 pin psi sensor (aftermarket ECU only)
  • Clutch Pressure
    No, Yes, 3 pin psi sensor (aftermarket ECU only)
  • Exhaust Backpressure
    No, Yes, 3 pin psi sensor (aftermarket ECU only)
  • Coolant Pressure
    No, Yes, 3 pin psi sensor (aftermarket ECU only)
  • Flex Fuel (does not include sensor)
    No, Yes, Continental sensor, Yes, ProEFI sensor 4 pin
  • Cam/Crank Sensors
    Factory Toyota, SRT/Hall Effect
  • Intended Chassis
    Universal, non specific fitment, LS400 UCF10 (1989-1994), LS400 UCF20 zenki (1995-1997), LS400 UCF20 kouki (1998-2000), SC400 Z30 non-VVTi (1991-1997), SC400 Z30 VVTi (1998-2000), SC430 Z40 (2001-2010), GS400 (1998-2000), GS430 (2001-2005), Mk3 Supra (1986-1992), MkIV Supra (1993-1998), 240SX S13, 240SX S14, Other (contact us), IS300 (2002-2005), IS300 (2001 only), FR-S/BRZ/86/GT86, 80s Toyota Pickup/4Runner

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

  • Fitment Type
    Vehicle Specific
Toyota/LexusLexus LS/Celsior1989-1994 UCF10/11 LS400/Celsior1UZ-FE 4.0 V8 non-VVTi
Toyota/LexusLexus LS/Celsior1998-2000 UCF20/21 LS400/Celsior1UZ-FE VVTi 4.0 V8
Toyota/LexusLexus LS/Celsior1995-1997 UCF20/21 LS400/Celsior1UZ-FE 4.0 V8 non-VVTi
Toyota/LexusLexus LS/Celsior2001-2005 UCF30 LS430/Celsior3UZ-FE 4.3 V8
Toyota/LexusLexus GS/Aristo1998-2005 S1601UZ VVTi 4.0 V8 (1998-2000) UZS160
Toyota/LexusLexus GS/Aristo1998-2005 S1603UZ 4.3 V8 (2001-2005) UZS161
Toyota/LexusCrown Majesta1995-1999 S1501UZ-FE 4.0 V8 (UZS151, UZS155, UZS157)
Toyota/LexusLexus SC/Soarer1992-2000 Z301UZ-FE VVTi 4.0 V8 UZZ30 (1998-2000)
Toyota/LexusTundra2007-2021 2nd Gen2UZ-FE 4.7 V8
Toyota/LexusTundra2000-2006 1st Gen2UZ-FE 4.7 V8

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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