VTI Mil-Spec FuelTech FT450 Engine Harness – Honda 4-Cylinder

⚠️ Pre-Order — Built To Order. Ships After Production.

This harness is available on a pre-order basis only. When you order, your build enters our production queue and is constructed specifically for your engine platform, injection strategy, and connector configuration. Typical lead time is 3–5 weeks. Rush builds available upon request.

This is not a universal loom. This is a structured race harness platform — built specifically for the FuelTech FT450 ECU on 4-cylinder Honda track applications. Every circuit is properly allocated, every transition is sealed, and every branch is labeled and strain-relieved.

If you're building a serious track car and you want the wiring to match the rest of the build — this is it.

Mil-Spec Construction Standard

• Raychem DR-25 heat shrink loom throughout
• Adhesive-lined sealed transitions at every breakout
• Fully booted breakouts — no exposed splices
• Concentric twisted trunk routing
• Shielded crank and cam circuits
• Engine-side black DR-25 / cabin-side Raychem yellow tag identification
• Labeled and strain-relieved branches

No split loom. No tape-wrapped transitions. No shortcuts.

Engine Compatibility

• D-Series
• B-Series
• H-Series
• F-Series
• K-Series

Track-focused and simplified race chassis setups only.

Engine Management Circuits Included

• Crank (Shielded)
• Cam (Shielded)
• TPS
• IAT
• ECT
• Wideband O2 Input
• Fuel Pump Output
• Fan Control Output

Injection Strategy Options

Full Sequential

• 4 Injector Outputs
• 4 Ignition Outputs
• Up to 3 Additional Sensor Inputs

Ideal for road race and precision fuel control applications.

Non-Sequential / Batch

• 2 Injector Outputs (Paired)
• 4 Ignition Outputs
• Up to 3 Additional Sensor Inputs
• Up to 4 Additional Auxiliary Outputs

Ideal for drag builds and output-heavy setups.

Sensor Expansion

Up to 3 additional white input channels available for: Oil Pressure, Fuel Pressure, Flex Fuel, Turbo Speed, EMAP, Driveshaft Speed, Brake Pressure, Oil Temp, Fuel Temp. Need more I/O? Step up to the FT550 platform.

Connector Options

• OEM Honda-style or AEM / Motorsport-style sensor connectors
• Honda, USCAR, or EV1 injector connectors
• Coil-on-plug or smart coil ignition connectors

FT450 vs FT550

FT450 is ideal for track-focused 4-cylinder race builds using relay-based architecture. FT550 is designed for full PDM integration and complete vehicle electrical replacement. Choose the platform that fits your chassis and integration needs.

How Pre-Order Works

After purchase, you'll receive a Build Confirmation Form to finalize your engine platform, injection strategy, connector preferences, and routing configuration. Production begins once your form is submitted — your harness is built exactly to your spec before it ships.