Kinugawa TD04L-15G Turbocharger Upgrade for Isuzu 4JG2T / 4JG2 / 4JH1

The Kinugawa TD04L-15G Turbocharger Upgrade is designed for Isuzu diesel engines including 4JG2T, 4JG2 and 4JH1, replacing many factory IHI RHF5, RHF4 and RHB5-style turbocharger applications.

This turbo is aimed at owners who want improved torque, responsive road performance and a practical upgrade over a worn or restrictive factory turbocharger.

Compared with the larger TD04L-15T option, the TD04L-15G is the more responsive choice, with a slightly smaller compressor wheel and a +40% torque focus. It is well suited to daily driving, towing, green-laning and touring vehicles where low to mid-range response is important.

Application: Isuzu 4JG2T / 4JG2 / 4JH1 diesel engines

Replacement Turbo Style: IHI RHF5 / RHF4 / RHB5 style applications with compatible 4-bolt outlet flange

Explore more turbo and engine upgrades:
4x4 Turbo Upgrades

Key Features of the Kinugawa TD04L-15G Turbo

• TD04L-15G turbocharger upgrade for Isuzu diesel engines
• Designed for 4JG2T, 4JG2 and 4JH1 applications
• Suitable replacement for many IHI RHF5 / RHF4 / RHB5 style turbo setups
• Designed with a +40% torque upgrade focus
• Crank horsepower support: approximately 150–200HP for diesel applications
• Compressor wheel: 43.4 / 56.0mm
• Turbine wheel: 41.3 / 47.0mm
• 6cm turbine housing with A/R 0.41
• Single-scroll internal wastegate turbine housing
• Oil and water cooled
• Journal bearing design
• Default actuator pressure: 1.0 bar / 14.7psi
• Supplied with oil feed, water line, oil return and gasket hardware

Compatibility

• Isuzu Trooper 3.1L 4JG2T
• Isuzu Bighorn 3.1L 4JG2T
• Holden Jackaroo 3.1L 4JG2T
• Opel Monterey 3.1L 4JG2T
• Isuzu 4JH1-TC 3.0L diesel with compatible IHI RHF5 VIEK / VA430093 / 8973544234 turbo setup
• Isuzu D-MAX / Holden Rodeo / Rodeo Pickup with compatible 4JH1-TC turbo configuration
• Many Isuzu or Mazda diesel engines using compatible standard 4-bolt RHF4H / RHF5 / RHB5 turbine outlet flange layouts

Important: Always confirm turbo flange, inlet, outlet, oil line and water line compatibility before ordering. Engine conversions, previous repairs and market specifications can affect fitment.

OE and Replacement Numbers

• 8971480760
• 8971480761
• 860010
• 860015
• 97086343
• 5T-614 860010
• E180027
• VA180027
• VD180027
• 8970385181
• 8-9703-85180
• 8-9703-85181

Turbo Part Number References

• VA430023 VICC
• VB430023 VI95
• VC430023 VIAN
• VD430023
• VE430023

Technical Overview

TD04L-15G vs TD04L-15T

The TD04L-15G is the more responsive option in this Isuzu turbo upgrade range. It is designed for owners who prioritise quicker spool-up, stronger low to mid-range torque and everyday drivability.

The TD04L-15T is the slightly larger option and is better suited to customers wanting more upper-range performance. For towing, road use, green-laning and a balanced daily-driven diesel setup, the TD04L-15G is often the more suitable choice.

Why Upgrade to a TD04L-15G Turbo?

The TD04L-15G is a practical upgrade for Isuzu diesel engines where the original IHI RHF5 or RHF4 turbo is worn, underperforming or limiting torque delivery.

It is designed to improve airflow while keeping the vehicle usable and responsive. This makes it suitable for off-road vehicles, touring builds and towing setups where usable torque is more important than chasing maximum top-end power.

The supplier notes that the larger compressor inlet and outlet may require silicone hose adaptation, and that the turbo can have slightly more lag than the factory turbo while supporting stronger performance.

Compressor and Turbine Options

• Cast 6+6 compressor wheel: Suitable for practical low-end torque and balanced diesel performance
• Billet 6+6 compressor wheel: Upgraded compressor wheel option for improved strength and response
• 12-blade STD turbine wheel: Standard turbine wheel option
• 9-blade STS turbine wheel: Optional performance turbine wheel configuration where available
• Anti-surge compressor housing: Optional compressor housing configuration where available

Note: Available options can vary depending on stock and selected configuration.

What’s Included

• 1 × Kinugawa TD04L-15G turbocharger with actuator
• 1 × Oil feed line kit
• 1 × Water feed and return line kit
• 1 × Oil return flange kit
• 1 × 45cm NBR hose for oil return
• 2 × Circlips
• 1 × Turbine inlet and outlet gasket set
• 8 × Studs and nuts
• Balance report with anti-counterfeit tag

Important Fitment Notes

• This turbo is designed to bolt to compatible factory manifold and downpipe layouts.
• The compressor cover inlet and outlet are larger than many stock turbo setups.
• Aftermarket silicone hoses may be required to adapt the inlet and outlet pipework.
• Please confirm inlet flange, outlet flange, oil feed, oil return and water line compatibility before ordering.
• Professional fitting and tuning knowledge are strongly recommended.
• Boost control, fuelling and exhaust gas temperatures should be monitored on upgraded diesel engines.

Recommended Supporting Upgrades

• High-flow exhaust system
• Front-mount or upgraded intercooler
• Boost and EGT gauges
• Professional diesel tuning
• Fresh oil feed and return routing
• Intake pipework and silicone hose upgrades
• Cooling system inspection before installation

Ideal Uses

• Isuzu Trooper 3.1 4JG2T turbo upgrades
• Isuzu Bighorn 3.1 4JG2T performance builds
• Holden Jackaroo diesel turbo replacement
• Opel Monterey 3.1 diesel turbo upgrade
• Isuzu D-MAX / Holden Rodeo 4JH1-TC turbo applications
• Off-road diesel performance builds
• Towing and touring vehicles requiring stronger low to mid-range response

Installation

• Professional installation is strongly recommended.
• Prime the turbo with clean engine oil before first start.
• Check oil feed, oil drain and water line routing before running the engine.
• Ensure all intake and exhaust connections are sealed correctly.
• Check actuator pressure and boost control setup before road use.
• Allow the vehicle to idle and check for leaks after installation.
• Re-check all fittings after the first heat cycle.

Estimated fitting time: 4–8 hours depending on vehicle condition, access, supporting pipework and installer experience.

FAQs

Q1: What engines is this Kinugawa TD04L-15G turbo designed for?
A: It is designed for Isuzu 4JG2T, 4JG2 and 4JH1 diesel engine applications with compatible turbo flange and pipework layouts.

Q2: Will it fit an Isuzu Trooper 3.1 4JG2T?
A: Yes, it is listed for Isuzu Trooper 3.1L 4JG2T applications.

Q3: Will it fit an Isuzu Bighorn 3.1 4JG2T?
A: Yes, it is listed for Isuzu Bighorn 3.1L 4JG2T applications.

Q4: Does it replace IHI RHF5 and RHF4 turbos?
A: Yes, it is designed as a replacement or upgrade for many IHI RHF5, RHF4 and RHB5-style applications with compatible flange layouts.

Q5: What power range does this turbo support?
A: The supplier lists this turbo for approximately 150–200HP crank horsepower on diesel applications.

Q6: What is the difference between the TD04L-15G and TD04L-15T?
A: The TD04L-15G is the more responsive option with a +40% torque focus, while the TD04L-15T is slightly larger and better suited to stronger upper-range performance.

Q7: Is this turbo oil cooled or water cooled?
A: It is both oil and water cooled.

Q8: What actuator pressure is supplied as standard?
A: The default actuator pressure is 1.0 bar / 14.7psi.

Q9: Will this be a direct bolt-on turbo?
A: It can bolt to compatible factory manifold and downpipe layouts, but the compressor inlet and outlet are larger than the stock turbo. Silicone hose adaptation may be required.

Q10: Does it include oil and water lines?
A: Yes, the kit includes an oil feed line kit, water feed and return line kit and oil return flange kit.

Q11: Does this turbo come with a balance report?
A: Yes, the kit includes a balance report with anti-counterfeit tag.

Q12: Should the vehicle be tuned after installation?
A: A safe setup should be checked by a diesel tuning specialist, especially where boost, fuelling, intercooler or exhaust changes are made.

Why Buy from OFM4x4.CO.UK

• Specialists in 4x4 turbo, intake and diesel performance upgrades
• Carefully selected products for towing, touring and off-road builds
• Technical support before and after purchase
• UK-based customer service
• Trusted supplier for serious 4x4 and expedition vehicles