Mitsubishi Triton ME-MJ 1986-1996 2.6L 4G54 Hurricane Headers HU172STM

Hurricane HU172STM headers (extractors) are designed for selected Mitsubishi Triton ME, MF, MG, MH and MJ models from 1986 to 1996 fitted with the 2.6L 4G54 Astron SOHC 8-valve petrol engine.

Suitable for applicable 2WD and 4WD Triton models, HU172STM replaces the restrictive original exhaust manifold with an Australian-made performance header designed to improve exhaust flow, torque, throttle response and engine performance.

The header configuration uses approximately 41mm (1 5/8") primary pipes, 44mm (1 3/4") secondary pipes and a 51mm (2") outlet.

CUT & WELD INSTALLATION – HU172STM requires fabrication to connect the header outlet to the existing exhaust system.

Please check availability and current lead time before ordering.

Key Features

• Suits selected Mitsubishi Triton ME, MF, MG, MH and MJ models
• Application range: 1986-1996
• Suits 2.6L 4G54 Astron petrol engine
• 2555cc inline four-cylinder
• SOHC 8-valve engine
• Carburettor fuel system
• Naturally aspirated
• Suits applicable 2WD and 4WD models
• Mandrel-bent mild-steel pipework
• Approximately 41mm (1 5/8") primary pipes
• Approximately 44mm (1 3/4") secondary pipes
• Approximately 51mm (2") outlet
• Cut-and-weld exhaust connection
• Australian Made

Construction

Hurricane HU172STM headers are Australian Made using mandrel-bent mild-steel pipework.

The header uses approximately 41mm (1 5/8") primary pipes feeding into 44mm (1 3/4") secondary pipes with a 51mm (2") outlet.

Additional Options

HU172STM requires fabrication of the connection between the header outlet and the vehicle's existing exhaust system. Suitable exhaust pipe and connecting components can be fabricated as required during installation.

Please contact Best Mufflers if you require advice on gaskets, exhaust components or installation requirements for your Triton.

Vehicle Fitment

• Make: Mitsubishi
• Model: Triton
• Series: ME / MF / MG / MH / MJ
• Year Range: Approximately 10/1986-10/1996
• Engine: 4G54 Astron
• Capacity: 2.6L / 2555cc
• Configuration: SOHC 8-valve inline four-cylinder
• Fuel Type: Petrol
• Fuel System: Carburettor
• Aspiration: Naturally aspirated
• Drive: 2WD / 4WD

IMPORTANT: HU172STM is for the 2.6L 4G54 Astron petrol engine. Mitsubishi Triton ME-MJ models were also produced with diesel and V6 petrol engines, so confirm the engine before ordering.

Header Specifications

• Part Number: HU172STM
• Brand: Hurricane
• Primary Pipe: Approximately 41mm (1 5/8")
• Secondary Pipe: Approximately 44mm (1 3/4")
• Outlet: Approximately 51mm (2")
• Construction: Mandrel-bent mild steel
• Manufacture: Australian Made
• Drive: Applicable 2WD & 4WD models
• Exhaust Connection: Cut and weld

Hurricane Collector Design

Hurricane headers use non-protruding secondary pipes in the collector, allowing the pipes to transition over the collector cone rather than extending unnecessarily into the exhaust gas path. This provides a smoother transition through the collector and helps reduce unwanted exhaust restriction.

Selected Hurricane header designs also use merge-style collector features to assist exhaust gas transition and scavenging through the collector outlet.

Fitment Notes

4G54 Engine: HU172STM suits the 2.6L 4G54 Astron SOHC 8-valve petrol engine. Australian application data confirms the 2555cc 4G54 throughout the ME-MJ Triton range.

2WD & 4WD: Australian application data confirms the 4G54 engine in both rear-wheel-drive (2WD) and 4WD Triton models during this period.

Year Range: Australian application catalogues list the 2.6L 4G54 Triton from approximately October 1986 through October 1996. Individual ME, MF, MG, MH and MJ series dates overlap in some application catalogues.

Engine Identification: The 4G54 used in this application is a 2555cc SOHC 8-valve naturally aspirated carburettor petrol engine.

Other Engines: Do not confuse this application with the 2.5L 4D56 diesel or later 3.0L 6G72 V6 petrol Triton. HU172STM is specifically listed here for the 2.6L 4G54.

Because these vehicles are now approximately 30-40 years old, check for engine conversions, previous exhaust modifications and altered mounting arrangements before installation.

Important Installation Information

HU172STM is a cut-and-weld installation. The header outlet must be connected to the vehicle's existing exhaust system by an experienced exhaust fitter. Welding and fabrication of the connecting pipe will be required.

Lubricate the original manifold studs and nuts with a suitable penetrating lubricant before removal. Older exhaust fasteners can become difficult to remove after many years of corrosion and repeated heat cycles.

Professional installation by an experienced exhaust workshop is recommended.

What's Included

• 1 x Hurricane HU172STM header/extractor assembly

Gaskets, exhaust connecting pipe, fasteners and other installation components should not be assumed to be included unless specifically confirmed before ordering.

Recommended With

A new cylinder-head exhaust manifold gasket is recommended when installing the headers.

Because HU172STM uses a cut-and-weld exhaust connection, additional 51mm (2") exhaust pipe and connecting components may be required depending on the existing exhaust system.

Inspect the original manifold studs and nuts before installation and replace damaged or heavily corroded components where required.

Why Good Headers & Exhaust Systems Matter

At 4,000 rpm, the 2.6L 4G54 four-cylinder engine theoretically draws approximately 5,200 litres of intake air per minute at 100% volumetric efficiency and expels around 15,600 litres of hot exhaust gas per minute at approximately 600°C.

A well-designed header and exhaust system helps manage this high gas flow efficiently, reducing restriction and improving exhaust scavenging, torque, throttle response and engine performance.

Installation Tips

Before installation, confirm that the vehicle is fitted with the 2.6L 4G54 Astron SOHC 8-valve petrol engine.

Lubricate threaded fasteners with WD-40 or a similar penetrating lubricant before removal to assist with easier removal and installation.

Trial-fit the header before completing the downstream exhaust connection. The outlet must be connected to the existing exhaust by an experienced exhaust fitter.

After installation and several heat cycles, inspect the exhaust system for leaks and recheck accessible fasteners where appropriate.

Warranty & Compliance

Hurricane headers are covered against manufacturing defects subject to supplier warranty terms and conditions.

Any emissions-control equipment required for the particular vehicle must remain correctly installed and operational.

Installation must comply with applicable Australian state or territory requirements relating to emissions, exhaust noise and vehicle modifications.

FAQ

What Mitsubishi Triton models do HU172STM headers suit?
HU172STM is designed for selected Mitsubishi Triton ME, MF, MG, MH and MJ models from approximately 1986-1996 fitted with the 2.6L 4G54 Astron petrol engine.

Does HU172STM fit both 2WD and 4WD Tritons?
Yes. This application covers applicable 2WD and 4WD models fitted with the 2.6L 4G54 engine.

Is the Mitsubishi 4G54 the 2.6L Astron engine?
Yes. In this Triton application the 4G54 is a 2555cc SOHC 8-valve naturally aspirated carburettor petrol four-cylinder from Mitsubishi's Astron engine family.

What size are HU172STM headers?
HU172STM uses approximately 41mm (1 5/8") primary pipes, 44mm (1 3/4") secondary pipes and a 51mm (2") outlet.

Do HU172STM headers bolt directly to the original exhaust?
No. HU172STM requires a cut-and-weld connection to the existing exhaust system. Professional exhaust installation is recommended.

Does HU172STM fit the 2.5L diesel Triton?
No. This listing is specifically for the 2.6L 4G54 petrol engine and should not be used for the 4D56 diesel application.

Does HU172STM fit the 3.0L V6 Triton?
No. The later 3.0L Triton uses the 6G72 V6 and requires a different header application.

Are HU172STM headers Australian made?
Yes. Hurricane performance headers are Australian made.

Should I check availability before ordering?
Yes. Please check availability and current lead time before ordering.

Can I pick up from the store?
Yes. Pick up is available but must be pre-arranged before collection.

How much is freight?
Freight varies depending on your delivery location and where stock is available. Please contact us for freight charges before ordering. Where possible, we can arrange dispatch from the nearest available product location to help reduce freight costs and delivery times.

Do you ship to the USA?
Yes. Best Mufflers regularly ships exhaust systems and exhaust parts to customers throughout the United States.

Please note that import duties, tariffs, taxes, and customs clearance fees are not included in the product or shipping price. Once your order is processed and the applicable charges are calculated, we will send you a secure payment link to finalise the import duties and tariff charges before dispatch.

Customer Support

For phone orders, advice, or part enquiries – contact us: