Low Mount Manifold to suit Toyota 1HZ Engine Variant - T2 Turbo Flange

Radius Fabrications 1HZ Low Mount T2 Turbo Manifold

The 1HZ Radius Low Mount T2 Manifold is a Radius Fabrications staple and one of our most proven turbo manifolds for the Toyota 1HZ platform.

A significant amount of research, development, and real-world testing has gone into this design. The result is a compact, efficient low-mount manifold that delivers faster turbo response, reduced heat retention, and reliable long-term performance for touring and performance-focused builds.

This manifold features a CNC-machined flow director beneath the turbo flange, engineered to guide exhaust gases more efficiently into the turbine. This design improves spool characteristics and helps reduce exhaust heat build-up, allowing the turbo to come on boost sooner and more smoothly.

Key Features

• Suits Toyota 1HZ diesel engine

• T2 turbo flange

• Low mount turbo configuration

• CNC-machined internal flow director beneath the turbo flange

• Improved exhaust gas velocity for quicker spool

• Reduced exhaust heat concentration

• Precision TIG-welded construction

• Heavy-duty 16mm thick flange

• Factory-style footprint for straightforward installation

• Designed and fabricated in Australia

• Single-scroll turbo design only

Important Information

• Exhaust gaskets are not supplied

• Customers must source gaskets from a local auto parts supplier

• Manifold shares the same footprint as the factory exhaust manifold

• Radius Fabrications strongly recommends replacing engine studs during installation

• Replacement studs should be the same diameter but longer to suit the thicker flange

• Manifold flange thickness: 16mm

• Any cutting, welding, or modification voids warranty

FAQ 

What turbo flange does this manifold suit?

This manifold is designed to suit T2 flanged turbochargers only.

What is the exhaust manifold stud size?

• M8 x 1.5 pitch for T2 applications
  

Do you supply exhaust gaskets?

No.
Radius Fabrications does not supply gaskets. Customers must source standard replacement gaskets locally.

Do you recommend replacing engine studs?

Yes.
Because the flange is 16mm thick, we recommend fitting longer studs of the same diameter for correct clamping and reliability.

Do you manufacture twin-scroll manifolds?

No.
Radius Fabrications does not manufacture twin-scroll manifolds.

What horsepower can this manifold support?

As a general guideline:

• Low mount manifolds: up to ~200 hp

• High mount manifolds: up to ~280 hp

• Merge manifolds: 280 hp and above

Actual results depend on turbo selection, tuning, exhaust setup, and supporting modifications.

Does this manifold fit other engines?

This manifold is fabricated specifically for the 1HZ engine.
Fitment to other engines is not recommended and voids warranty.