Billet DBW 74mm Throttle Body Adapter kit for 1JZ & 2JZ

Description

Billet DBW 74mm Throttle Body Adapter kit for 1JZ & 2JZ

️ Preorder Now — First batch ships in approximately 4 weeks.

I wanted to convert my Supra to drive-by-wire (DBW), but couldn’t find an adapter that retained the OEM throttle body length, had a true 74mm internal diameter, and looked clean and logo-free. Without maintaining the OEM length, I’d have to modify the intercooler piping, messing with the symmetry of the engine bay.

Using a 74mm throttle is also ideal: it strikes the perfect balance between performance and throttle response. So I teamed up with friends experienced in CAD and billet CNC machining to develop a DBW conversion kit that did things properly.

After testing it thoroughly on my own MK4 Supra, I’m now confident releasing it to the public.

This isn’t just a simple adapter plate it’s a fully machined billet aluminum assembly, precision-cut inside and out to match the Bosch 74mm DBW throttle body while preserving the stock throttle body length.

Why 74mm?

• Perfect balance between drivability and flow

• Proven to support up to 1100+ HP

• My own 1100HP 3.6L 2JZ runs a 74mm throttle with no issues

Unless you’re chasing extreme power, there’s no need to go larger.

Key Features:

• Adapts Bosch 74mm DBW throttle body to JZ OEM intake manifold

• Retains OEM throttle body length for plug-and-play fitment

• Logo-free raw billet aluminum finish for a clean engine bay

• Internally machined for proper airflow and performance

• Fully O-ring sealed — no gaskets required

Kit Includes:

• Billet adapter for intake manifold

• Billet adapter for intercooler piping

• O-rings & all required mounting hardware

• Optional: Bosch 74mm DBW Throttle Body (if selected)

Installation Notes:

• Requires ball-ended H6 and H5 hex/Allen tools

• Apply dielectric grease to o-rings before assembly

• Also recommended: apply dielectric grease inside the throttle body electrical connector for water protection

This adapter is designed for builders who care about performance and aesthetics. Whether you’re modernizing your JZ engine or cleaning up your bay, this kit has you covered.