Nissan Navara D21 1992-1997 2.4L KA24E 4WD Wildcat Exhaust Headers WILD057

Wildcat WILD057 headers (extractors) are designed for the Nissan Navara D21 4WD from approximately 1992 to 1997 fitted with the 2.4L KA24E SOHC 12-valve EFI petrol engine.

Featuring an interference design for street and 4WD performance applications, WILD057 provides a performance replacement for the original exhaust manifold and is designed to improve exhaust flow, torque, throttle response and engine performance.

The supplied WILD057 specifications list approximately 41mm (1.58") primary pipes, 44mm (1.75") secondary pipes and a 57mm (2.25") outlet.

Australian Made.

Please check availability and current lead time before ordering.

Key Features

• Suits Nissan Navara D21 4WD
• Australian KA24E application approximately 06/1992-02/1997
• Suits 2.4L KA24E petrol engine
• 2389cc inline four-cylinder
• SOHC 12-valve engine
• Electronic multi-point fuel injection
• Naturally aspirated application
• 4WD application
• Interference design for street and 4WD performance applications
• Approximately 41mm (1.58") primary pipes
• Approximately 44mm (1.75") secondary pipes
• Approximately 57mm (2.25") outlet
• Australian Made

Construction

Wildcat WILD057 headers are Australian Made and designed around the Nissan Navara D21 installation of the 2.4L KA24E SOHC 12-valve EFI petrol engine.

The supplied header specifications list approximately 41mm (1.58") primary pipes feeding into 44mm (1.75") secondary pipes with a 57mm (2.25") outlet.

Additional Options

A replacement exhaust manifold/header gasket is available separately – see RBG057.

Please contact Best Mufflers if you require advice on gaskets, exhaust components or installation parts for your D21 Navara.

Vehicle Fitment

• Make: Nissan
• Model: Navara
• Series: D21
• Australian Application: Approximately 06/1992-02/1997
• Engine: KA24E
• Capacity: 2.4L / 2389cc
• Configuration: SOHC 12-valve inline four-cylinder petrol
• Fuel System: EFI / Multi-point injection
• Aspiration: Naturally aspirated
• Drive: 4WD

IMPORTANT: WILD057 is specifically listed for the 4WD KA24E application. Australian D21 Navaras were produced with several petrol and diesel engines and in both 2WD and 4WD configurations. Confirm the engine and drivetrain before ordering.

Header Specifications

• Part Number: WILD057
• Design: Interference design for street and 4WD performance applications
• Primary Pipe: Approximately 41mm (1.58")
• Secondary Pipe: Approximately 44mm (1.75")
• Outlet: Approximately 57mm (2.25")
• Drive: 4WD
• Replacement Gasket: RBG057

Fitment Notes

KA24E Engine: WILD057 is designed for the 2.4L KA24E SOHC 12-valve EFI petrol engine. Australian application data identifies the D21 KA24E at 2389cc with multi-point electronic fuel injection.

4WD Application: This WILD057 application is specifically for the 4WD D21 Navara. Do not assume fitment to the 2WD KA24E version.

Transmission: Australian application data identifies the KA24E D21 4WD primarily as a manual-transmission application. The original WILD057 information supplied states manual and automatic compatibility, but this should be confirmed before ordering for any automatic 4WD vehicle.

Year Range: Australian parts application data gives approximately June 1992 to February 1997 for the KA24E D21 4WD. The broader 1992-1997 range is retained in the product title for clarity.

Because these vehicles are now around 30 years old, engine swaps and exhaust modifications are common. Confirm the engine code, drivetrain and existing exhaust configuration before ordering.

What's Included

• 1 x Wildcat WILD057 header/extractor assembly

Gaskets, bolts, sealant and other installation hardware should not be assumed to be included unless specifically confirmed before ordering.

Recommended With

RBG057 – replacement exhaust manifold/header gasket.

Before installation, inspect the existing exhaust system, manifold studs, engine mounts and associated mounting hardware.

Why Good Headers & Exhaust Systems Matter

At 4,000 rpm, the 2.4L KA24E four-cylinder engine theoretically draws approximately 4,800 litres of intake air per minute at 100% volumetric efficiency and expels around 14,400 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 a Nissan Navara D21 4WD fitted with the 2.4L KA24E SOHC 12-valve petrol engine.

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

Professional installation is recommended. Trial-fit the header and check the existing downstream exhaust configuration before final tightening.

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

Warranty & Compliance

Any catalytic converter, oxygen sensor and other 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 Nissan Navara does WILD057 fit?
WILD057 is designed for the Nissan Navara D21 4WD fitted with the 2.4L KA24E SOHC 12-valve EFI petrol engine.

What is the correct year range?
Australian application data places the KA24E D21 4WD at approximately June 1992 to February 1997. The product is therefore described as 1992-1997.

What engine is the KA24E?
The KA24E used in the Australian D21 Navara is a 2389cc naturally aspirated SOHC four-cylinder petrol engine with 12 valves and electronic multi-point fuel injection.

Does WILD057 fit a 2WD D21 Navara?
This WILD057 application is specifically listed for the 4WD model. The D21 KA24E was also sold in 2WD form, so drivetrain configuration should be confirmed before ordering.

Does WILD057 fit an automatic 4WD Navara?
The original product information states manual and automatic compatibility, but Australian application data identifies the KA24E 4WD primarily with a manual transmission. Please confirm fitment with Best Mufflers before ordering for an automatic 4WD vehicle.

Does WILD057 fit the earlier Z24 engine?
No. Earlier D21 Navaras used the 2.4L Z24, which is a different engine. WILD057 is listed for the KA24E application.

What size are WILD057 headers?
The supplied specifications list approximately 41mm (1.58") primary pipes, 44mm (1.75") secondary pipes and a 57mm (2.25") outlet.

What gasket suits WILD057?
The supplied product information lists RBG057 as the replacement header/manifold gasket.

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

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