Low Mount Manifold to suit Toyota 1HZ - T3 Turbo

Radius Fabrications 1HZ Low Mount Turbo T3 Manifold

To Suit Toyota 1HZ – T3 Flanged Turbo

The Radius Fabrications 1HZ Low Mount Turbo Manifold is engineered for reliability, improved exhaust flow, and straightforward installation on Toyota 1HZ diesel engines. Designed specifically to suit T3 flanged turbochargers, this manifold is ideal for touring, towing, and off-road builds where strength and consistent performance are essential.

Manufactured using high-quality materials and precision TIG welding, this low mount manifold retains a compact turbo position while offering improved turbo response over factory-style setups. It is built with the same footprint as the standard factory manifold, making fitment simple while allowing for stronger construction and better long-term durability.

This manifold is designed for single-scroll turbo applications only.

Key Features

• Suits Toyota 1HZ diesel engine

• T3 flanged turbo compatibility

• Low mount turbo configuration

• Precision TIG-welded construction

• Optimised exhaust gas flow for improved spool and throttle response

• Factory-style footprint for easier installation

• 16mm thick flange for added strength

• Designed for long-term reliability in harsh conditions

Wastegate Flange Information (Optional)

If you choose to add a wastegate flange:

• You must supply both the wastegate and flange

• The wastegate must be sent to Radius Fabrications prior to manifold fabrication

• Radius Fabrications does not sell wastegates or wastegate flanges

• We only weld on customer-supplied components

• Any modification to a standard Radius manifold voids warranty

This option allows experienced builders to tailor boost control to their setup, however all responsibility for compatibility and performance remains with the customer.

Important Information

• Gaskets are not supplied

• Customers must source exhaust manifold gaskets locally

• Radius recommends replacing engine studs during installation

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

• Manifold modifications of any kind void warranty

FAQ 

What turbo flange does this manifold suit?

This manifold is designed specifically for T3 flanged turbochargers.

What is the exhaust manifold stud size?

• M10 as standard

Do you supply gaskets?

No.
Radius Fabrications does not supply gaskets. Our manifolds use the same footprint as the factory manifold, allowing standard replacement gaskets to be sourced from local auto parts suppliers.

Do you recommend replacing engine studs?

Yes.
Our manifold flange is 16mm thick, which is thicker than factory. We recommend fitting longer studs of the same diameter to ensure correct engagement and clamping force.

Do you manufacture twin-scroll manifolds?

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

What horsepower can this manifold handle?

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 limits depend on turbo selection, tuning, EGT management, and overall engine setup.