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


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Tweak'd Universal Race Car JZ 2JZ 1JZ Full Harness

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

This listing is for a brand new engine harness swap into your favorite chassis. These wiring harnesses are built using new wire, new OEM terminals, and new OEM connector housings. Designed for use with the JDM ECU (High impedance injectors, MAP and IAT sensor, no MAF wiring). The only used connectors on the harness are the plugs that connect to the body harness which are taken from original core harnesses.

Available for auto or manual transmission (auto is $200 extra). There is a core charge of $300 for the original MkIV 2JZ-GE wiring harness. You may send in your core harness ahead of time to avoid the $300 core charge, or we will refund the core charge to you once you have returned the original engine harness to us. (Please note that core harnesses must be returned within 30 days of receipt of your new harness in order to receive the refund!)

Several looming options are available including braided sleeving and extreme-duty heatshrink looming for the ultimate in harness protection and a clean show-car look (custom looming options add an additional one week lead time)

These harnesses aren't just built and shipped it off. Every harness we build is laid out on our tried-and-true harness jigs to ensure a perfect fit every single time. Every detail is checked to make sure that your wiring harness is built to our standards. We don't ever send a harness to a customer unless we would happily install that on our own engine swap for our personal car. Then not one, but two engine swap experts double-check every single terminal, connector, and wire on your harness to make sure every circuit has perfect continuity. While we all know that mistakes aren't impossible, we ship every one of our harnesses with full confidence that you, our customer, will never need to use our unbeatable LIFETIME warranty on these.

  • Engine
    2JZGTE, 2JZGTE VVTi, 1JZGTE, 1JZGTE VVTi, 2JZGE
  • 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
  • O2 Sensor Type
    Toyota 3 Pin, Toyota 4 Pin, AEM Wideband, Bosch LSU4.2/4.9 Wideband
  • IAT Sensor Type
    Aftermarket, AEM, OEM Plug
  • MAP Sensor Type
    OEM Plug, Aftermarket, AEM
  • 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
  • Cam/Crank Sensors
    SRT/Hall Effect, Factory Toyota
  • Chassis
    MkIV Supra N/A 93-97, MkIV Supra turbo USDM 93-98, Mk3 Supra 86.5/87 (Core required), Mk3 Supra 88/early 89 (Core required), Mk3 Supra 89.5-90 (Core required), Mk3 Supra 91/92 (Core required), SC300 92-94, SC300 95-97, SC300 98/99, S13 Nissan 240SX (Core required), S14 Nissan 240SX (Core required), FC RX7 (Core required), IS300 2001 Dual ECU (Core required), IS300 2002-2005 Dual ECU (Core required), IS250/IS350 Dual ECU (Core required), FRS/BRZ/86/GT86 Dual ECU (Core required), Other Dual ECU (BMW E46+, G35/350Z, S2000, etc. (Core required), Universal (not chassis specific)
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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.

Make Model Year Engine