RB25DET and RB26DETT engines in the R34 GT-T and Stagea WC34 demand a reliable, straightforward path to advanced engine management. The Haltech Elite 2000/2500 Plug'n'Play Adaptor Harness Kit is engineered specifically for these manual transmission models, allowing a direct, hassle-free upgrade from the factory ECU. The injection-molded plastic adaptor harness plugs straight into the existing factory wiring loom, eliminating the need for complex custom wiring while preserving all critical OEM functions.

This complete kit includes the M14 x 1.5 air temperature sensor with matching plug and pins, plus the auxiliary I/O 16-pin Tyco plug and pins, giving you immediate access to expanded inputs and outputs for advanced tuning. Whether you are running a stock engine or a heavily modified build, the adaptor harness ensures seamless integration with Haltech’s powerful Elite series ECUs, unlocking features like real-time tuning, data logging, flex fuel support, and precise boost control.

At Terra Firma Automotive, we supply this genuine Haltech Elite 2000/2500 Plug'n'Play Adaptor Harness Kit as the trusted solution for R34 GT-T and Stagea WC34 owners seeking professional-grade engine management without the installation headaches. It provides the reliability, convenience, and expandability needed for both street and track applications. For enthusiasts ready to modernize their RB engine control and gain full tuning flexibility, this Haltech adaptor kit is one of the cleanest and most effective upgrades available.

 

• Haltech Elite 2000/2500 Plug'n'Play Adaptor Harness Kit for R34 GT-T and Stagea WC34 (MT only)
• Direct plug-and-play connection to factory wiring loom
• Injection molded plastic adaptor harness for reliable fitment
• Includes M14 x 1.5 air temperature sensor with plug and pins
• Auxiliary I/O 16-pin Tyco plug and pins for expanded functionality
• Preserves all critical OEM sensor and vehicle functions
• Ideal for stock to highly modified RB25DET and RB26DETT engines
• Simplifies installation of Haltech Elite series ECUs
• Enables real-time tuning, data logging, and advanced features
• Supports flex fuel, boost control, and other performance upgrades
• Premium Haltech engineering with proven real-world results
• Clean, professional installation with no major rewiring required
• Essential upgrade for modern engine management on R34 and Stagea
• Trusted by enthusiasts for reliability and ease of use
• Perfect foundation for serious RB25/RB26 tuning projects
• ⚠️ California Proposition 65 Warning: This product can expose you to chemicals which are known to the State of California to cause cancer and reproductive harm - www.P65Warnings.ca.gov
• ⚠️ Emissions / California Legal Disclaimer – Off-Road / Competition Use Only: This product is intended for off-road, competition, and track use only. It is not legal for sale or use on public roads or highways in California (or any other CARB-adopting state). For more information Click Here.