Mid-engine, rear-drive, turbocharged, and still running a factory ECU that has no idea what you've done to it.
The 1999 Toyota MR2 3S-GTE SW20 Turbo is one of the most engaging platforms of the 1990s, and the 3S-GTE responds exceptionally well to proper tuning. The Tuned By Shawn Boomslang PNP Wiring Harness 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 cleanly and holds consistently lap after lap
- Throttle response that matches the mid-engine character of the car
- Power delivery that's predictable exactly when you need it in corners
- A tune built around your specific modifications instead of fighting stock fuel tables
- Confidence in the engine management when the car is working hardest
Features
- Plug-and-play fitment for 1999 Toyota MR2 3S-GTE, manual transmission
- 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
Working in the MR2's rear engine bay means every connection needs to be correct the first time. Boomslang built this harness for the specific 1999 SW20 connector layout with OEM-spec connectors and appropriate wire gauge. The factory harness stays untouched, fully reversible.
Kit Includes
- 1x Boomslang PNP wiring harness for 1999 Toyota MR2 3S-GTE
- Haltech Nexus ECU sold separately
Fitment
1999 Toyota MR2 3S-GTE, Manual Transmission.