Haltech Nexus R5 VCU & Toyota Supra 2JZ-GTE VVT-i 1998-2002 Plug 'n' Play Adapter Harness Kit - A341E Automatic (HT-650994)

The Supra 2JZ-GTE VVT-i responds to boost and tuning the factory ECU was never built to deliver.

The Toyota Supra 2JZ-GTE VVT-i is a capable platform, but factory engine management puts a ceiling on what's possible. The Tuned By Shawn PNP Wiring Harness Kit for the Haltech Nexus connects directly to your factory harness without any permanent modifications, giving the Haltech Nexus full standalone engine control. No cutting, no splicing, fully reversible.

Advantages

• Boost that builds and holds exactly where you dial it in, not where the factory knock strategy allows
• Timing that advances where it should instead of pulling at the first sign of heat
• Power delivery that's linear and predictable through the entire boost curve
• A tune built around your exact modifications, not averaged factory parameters
• Confidence that what happened on the dyno is what happens on the track

Features

• Plug-and-play fitment for 1998-2002 Toyota Supra 2JZ-GTE VVT-i, automatic transmission (Aisin A341E)
• Compatible with Haltech Nexus R3, R5, S2, and S3 ECUs
• No cutting or splicing of factory wiring
• OEM-quality connectors, USA-built by Boomslang Fabrication
• Fully reversible, factory harness preserved
• For competition and off-road use

The Details

Built specifically for this vehicle's connector layout with OEM-spec connectors and correct wire gauge throughout. Your factory harness stays completely untouched and the car can return to stock at any time. The Haltech Nexus takes full engine control once installed, giving your tuner a clean vehicle-specific foundation to build a proper map from.

Transmission

The VVT-i turbo cars run the A341E rather than the standard A340E — the heavy-duty version of the same A340 family, built with a larger pump and converter to handle 2JZ-GTE torque. The automatic chassis uses a different engine-bay connector layout than the manual, which is why this harness carries its own part number. Check the code stamped on the transmission ID plate before ordering — if the car is a manual, you want the manual-transmission harness instead.

Kit Includes

• 1x Boomslang PNP wiring harness for 1998-2002 Toyota Supra 2JZ-GTE VVT-i
• Haltech Nexus R5 VCU
• Air Temp Sensor - Small Thread Thread: M14 x 1.5

Fitment

1998-2002 Toyota Supra 2JZ-GTE VVT-i, Automatic Transmission (A341E).