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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
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