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SKU: 4103-RT003 | UPC: 4957266553039
HKS Blitz Apexi STI 91-92 Supra TT Harness MR2 1991-1995 Turbo Celica All Trac 1989-1993
This ECU wiring harness adapter connects HKS Blitz Apexi and STI standalone ECUs directly to factory engine harnesses on 1991-1992 Toyota Supra Twin Turbo TT-3 1991-1995 MR2 Turbo and 1989-1993 Celica All-Trac models. It delivers clean precise signals for optimized fuel ignition and boost control to unlock greater power output. Built for JDM turbo engines like 7M-GTE 3S-GTE ensuring dependable operation under high-performance demands.
Key Features
- Multi-Brand Compatibility: Works with HKS F-CON Blitz Power FC Apexi Power FC and STI ECUs sharing TT-3 pinout for versatile tuning options
- Plug-and-Play Design: Matches exact factory connector layouts no cutting splicing or soldering required for fast installation
- High-Temperature Wiring: Insulated with heat-resistant silicone covers withstands engine bay temperatures up to 200C for long-term durability
- Precise Pin Mapping: Factory-correct wiring order supports full ECU functions including sensors injectors and igniters without errors
- Performance Optimized: Low-resistance conductors minimize voltage drop for sharper throttle response and consistent power delivery
Product Notes
- Confirm your ECU model uses TT-3 style connector before purchase
- Inspect harness for damage upon receipt and store in dry conditions
- Packaged in anti-static bag inside protective box for safe transit
Installation Notes
- Professional installation recommended.
- Disconnect battery before swapping ECU and harness
- Compatible with OEM ECU plugs and mounting points no modifications needed
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1991-1992 | Toyota | Supra | Twin Turbo (TT-3 7M-GTE JDM) |
| 1991-1995 | Toyota | MR2 | Turbo (SW20 3S-GTE) |
| 1989-1993 | Toyota | Celica | All-Trac GT-Four (ST185 3S-GTE) |
Why Choose HKS?
- Proven in JDM racing and street applications for decades
- Engineered with OEM-level quality for zero signal interference
- Designed by tuning experts for exact turbo engine compatibility
Frequently Asked Questions
-
Q: Will this fit USDM Supra or MR2 models?
A: Designed for JDM TT-3 pinout fits 91-92 JDM Supra 7M-GTE 91-95 SW20 MR2 Turbo and ST185 Celica GT-Four verify your harness connector matches -
Q: What wire gauge and insulation is used?
A: 20-22 AWG copper strands with silicone insulation rated for 105C continuous resists oil abrasion and heat -
Q: Is any ECU flashing or software needed?
A: Harness provides direct connection compatible ECUs ready to run after install tuning via manufacturer software
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Anti-static bag in 12 x 8 x 2 inch corrugated box
- Weight: 0.9 lbs
HKS
HKS is a Japanese manufacturer of premium performance parts founded in 1973 that has been at the forefront of turbocharged engine development, producing turbochargers, exhaust systems, engine management, intercoolers, and supporting performance components for some of the most iconic Japanese sports cars ever built. The brand's GT and GTIII turbocharger series, Super Sequential Blow Off Valves, and Racing Suction intake kits are recognized globally as benchmark-quality products that combine Japanese manufacturing precision with decades of motorsport development experience. HKS products are particularly well-known in the Toyota Supra, Mitsubishi Evo, Subaru STI, Nissan GT-R, and Honda NSX communities, where the brand's heritage in building the world's fastest versions of these cars has created a loyal following among enthusiasts who want the best available components. From a simple racing suction kit to a complete GT turbo with intercooler and ECU tune, HKS provides an end-to-end perf...
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