The fourth-gen Prelude B20A is a respected naturally aspirated Honda platform with a loyal following in the tuning community.
The Honda Prelude B20A has more in it than the factory ECU allows, and proper standalone calibration is how you find it. 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
- Throttle response that's immediate and direct, not filtered through Honda's conservative factory mapping
- VTEC engagement calibrated to your actual RPM targets, not factory compromise points
- Fuel and ignition timing built around your modifications
- Idle stability that's consistent and locked in at all temperatures
- A tune that reflects your build rather than working around it
Features
- Plug-and-play fitment for 1988-1991 Honda Prelude B20A, 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
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.
Kit Includes
- 1x Boomslang PNP wiring harness for 1988-1991 Honda Prelude B20A
- Haltech Nexus ECU sold separately
Fitment
1988-1991 Honda Prelude, Manual Transmission.