VTI Motorsport H2B / Honda DOHC Engine Loom

Motorsport construction. Honda simplicity. Built by VTI.

The new VTI Motorsport H2B Engine Loom is a production-ready Honda engine harness developed around the OBD1 P28 + Hondata S300 platform.

Built from the ground up using USA-sourced M22759/32 Tefzel wire and Raychem materials, this loom brings true Milspec construction to a clean, practical Honda engine harness without turning the installation into an overcomplicated race harness.

Full concentric construction. Shielded twisted MIL-core circuits. Individually twisted sensor branches. Raychem SCL transitions. Motorsport-grade DTM connections. Every termination identified and every loom electrically tested before it leaves VTI.

This is the foundation of the VTI Motorsport Honda loom platform.

Built for H2B. Designed Around Honda.

Originally developed for H2B applications, the routing and architecture work exceptionally well across Honda’s DOHC platforms, including:

H22 · H23 · F20B · B20 · B18 · B16

The loom is designed around both front- and rear-mounted alternator configurations, making it a versatile engine-side solution without requiring a completely different harness architecture for every application.

High-Spec Construction Without the Bulk

This is a non-bulkheaded Motorsport engine loom designed for both serious street cars and race applications.

• USA-sourced M22759/32 Tefzel
• Full concentric twisted loom construction
• Shielded twisted MIL-core
• Individually twisted sensor branches
• Raychem materials throughout
• Raychem SCL transitions
• DTM Motorsport connectors
• Extended ECU and C101 branches
• Twisted branches carried toward the connectors
• Color-coded VTI identification at every termination
• <0.47” maximum finished loom diameter

The result is a compact, clean engine loom with the construction quality you’d expect from a much larger Motorsport harness.

Motorsport Connector Architecture

The main distributor connection is converted to a DTM 12-pin connector with a supplemental harness for the selected distributor configuration.

The loom also includes:

• Selectable OBD1 / OBD2A distributor configuration
• Selectable injector connector configuration
• DTM-based supplemental alternator connection
• Integrated DTM 2-pin boost-control connector
• Front or rear alternator configuration

The pictured loom is shown with unterminated injector branches.

Built to a Repeatable VTI Standard

This isn’t a one-off custom harness.

The H2B loom was developed as a repeatable VTI production platform. Every loom follows the same routing architecture, material specification, identification system, termination process, inspection, and electrical testing procedure.

That means you get the same VTI construction every time.

Clean. Compact. Serviceable. Repeatable.

Simple Options. No Unnecessary Complexity.

Choose only what actually changes the engine loom:

Injector Style
Select your preferred connector configuration.

Distributor Style
OBD1 or OBD2A.

Alternator Location
Front or rear mounted.

Engine Loom Only

This product includes the engine loom only.

ECU integration harnesses, chassis wiring, bulkhead systems, PDM integration, and other additional harnessing are not included and can be purchased separately from VTI.

Built as a standalone engine loom, this gives you a clean foundation to integrate into your own vehicle without paying for wiring you don’t need.

VTI Motorsport

Milspec materials. Motorsport construction. Honda-specific engineering.

Manufactured in Vermont, USA.

Application: Honda DOHC / H2B-based applications
ECU Platform: OBD1 P28 / Hondata S300
Construction: Full concentric twisted loom
Primary Wire: M22759/32 Tefzel
Shielding: Shielded twisted MIL-core circuits
Sensor Wiring: Individually twisted sensor branches
Main Distributor Connector: DTM 12-pin
Boost Control: DTM 2-pin
Alternator: DTM supplemental interface
Injector Configuration: Selectable
Distributor Configuration: Selectable
Alternator Configuration: Front or rear mounted
Maximum Loom Diameter: <0.47”
Loom Materials: Raychem
Transitions: Raychem SCL
Identification: Color-coded VTI wire identification at every termination
Testing: Fully inspected and electrically tested
Configuration: Non-bulkheaded engine loom
Supply: Engine loom only