Mitsubishi Pajero NE NF NG 1987-1991 2.6L 4G54 4WD Wildcat Exhaust Headers WILD098

Wildcat WILD098 headers (extractors) are designed for the Mitsubishi Pajero NE, NF and NG 4WD from 1987 to April 1991 fitted with the 2.6L 4G54 SOHC 8-valve naturally aspirated petrol engine.

Featuring a Tri-Y header design, WILD098 provides a performance replacement for the original exhaust manifold and is designed to improve exhaust flow, torque, throttle response and engine performance.

The Wildcat application catalogue specifies approximately 41mm (1⅝") primary pipes, 44mm (1¾") secondary pipes and a 57mm (2¼") slip outlet.

IMPORTANT: WILD098 is not a complete bolt-on connection to the existing exhaust system. An S-bend must be fabricated during installation to match the headers to the exhaust system.

Australian Made.

Please check availability and current lead time before ordering.

Key Features

• Suits Mitsubishi Pajero NE, NF and NG
• Application range: 1987-April 1991
• Suits 2.6L 4G54 petrol engine
• SOHC 8-valve four-cylinder application
• 4WD application
• Tri-Y header design
• Approximately 41mm (1⅝") primary pipes
• Approximately 44mm (1¾") secondary pipes
• Approximately 57mm (2¼") slip outlet
• Suits manual transmission models
• Suits automatic transmission models
• Suits vehicles with air-conditioning
• Suits vehicles with power steering
• Oxygen-sensor provision
• Australian Made

Construction

Wildcat WILD098 headers are Australian Made and use a Tri-Y configuration designed around the Mitsubishi 2.6L 4G54 petrol engine.

The header configuration uses approximately 41mm (1⅝") primary pipes feeding into 44mm (1¾") secondary pipes with a 57mm (2¼") slip outlet.

Additional Options

A replacement header/manifold gasket is available separately – see RBG056S.

Please contact Best Mufflers if you require advice on the exhaust fabrication or other components required to complete the installation.

Vehicle Fitment

• Make: Mitsubishi
• Model: Pajero
• Series: NE / NF / NG
• Year Range: 1987-April 1991
• Engine: 4G54
• Capacity: 2.6L / 2555cc
• Configuration: SOHC 8-valve inline four-cylinder petrol
• Aspiration: Naturally aspirated
• Drive: 4WD
• Transmission: Manual / Automatic

IMPORTANT: Confirm your Pajero is fitted with the 2.6L 4G54 petrol engine before ordering. NE-NG Pajeros were also available with other petrol and diesel engines.

Header Specifications

• Design: Tri-Y
• Primary Pipe: Approximately 41mm (1⅝")
• Secondary Pipe: Approximately 44mm (1¾")
• Outlet: Approximately 57mm (2¼")
• Outlet Type: Slip
• Manual Transmission: Yes
• Automatic Transmission: Yes
• Air-Conditioning: Yes
• Power Steering: Yes
• Oxygen Sensor: Provision listed
• Replacement Gasket: RBG056S

Fitment Notes

Exhaust Fabrication Required: The Wildcat application catalogue specifically states that an S-bend must be fabricated to match the headers to the existing exhaust system. Allow for exhaust fabrication during installation.

4G54 Engine: WILD098 is designed for the 2.6L 4G54 SOHC 8-valve naturally aspirated petrol engine.

Transmission: WILD098 is listed for both manual and automatic transmission models.

Accessories: The application catalogue lists compatibility with air-conditioning and power steering.

Because these vehicles are now more than 35 years old, engines and exhaust systems may have been replaced or modified. Confirm the engine and existing exhaust configuration before ordering.

What's Included

• 1 x Wildcat WILD098 header/extractor assembly

The fabricated S-bend, gasket, bolts and other installation components should not be assumed to be included unless specifically confirmed before ordering.

Recommended With

RBG056S – replacement header/manifold gasket.

Professional exhaust fabrication is required to manufacture the S-bend connecting the WILD098 outlet to the existing exhaust system.

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 Pajero is an NE, NF or NG 4WD fitted with the 2.6L 4G54 petrol engine.

WILD098 requires an S-bend to be fabricated to connect the header outlet to the existing exhaust system. Professional installation by an exhaust specialist is recommended.

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

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

Warranty & Compliance

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 Pajero does WILD098 fit?
WILD098 is listed for the Mitsubishi Pajero NE, NF and NG 4WD from 1987 to April 1991 fitted with the 2.6L 4G54 petrol engine.

What engine does WILD098 suit?
WILD098 suits the 2.6L 4G54 SOHC 8-valve naturally aspirated four-cylinder petrol engine.

Does WILD098 fit manual and automatic Pajeros?
Yes. The Wildcat application catalogue lists WILD098 for both manual and automatic transmission models.

Does WILD098 fit vehicles with air-conditioning and power steering?
Yes. Both air-conditioning and power steering are shown as compatible in the Wildcat application information.

Does WILD098 bolt directly to the existing exhaust?
No. The Wildcat catalogue specifically states that an S-bend must be fabricated to match the headers to the exhaust system.

What size are the WILD098 headers?
The catalogue specifies approximately 41mm (1⅝") primary pipes, 44mm (1¾") secondary pipes and a 57mm (2¼") slip outlet.

What gasket suits WILD098?
The listed replacement gasket is RBG056S.

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: