Toyota LandCruiser FZJ100 4.5L 1FZ-FE Headers – Wildcat WILD242

Wildcat WILD242 exhaust headers (extractors) are designed for the Toyota LandCruiser 100 Series FZJ100 fitted with the 4.5L 1FZ-FE DOHC inline six-cylinder petrol engine from 1998 to 2007.

Featuring an interference-style extractor design, WILD242 replaces the restrictive factory exhaust manifold with larger, smoother-flowing pipework. The design helps improve exhaust gas flow and scavenging to reduce restriction and improve low and mid-range torque, throttle response and overall engine performance, making these headers well suited to street, touring, towing and off-road applications.

Key Features

• Designed for Toyota LandCruiser 100 Series FZJ100
• Suits the 4.5L 1FZ-FE DOHC inline six-cylinder petrol engine
• Interference-style design for street and off-road performance
• 1.58" primary pipes
• 2.00" secondary pipes
• 2.50" outlet
• Direct-fit design for the applicable FZJ100 application
• Designed to improve exhaust flow, torque, throttle response and engine performance

Construction

• Australian-made Wildcat performance headers
• Quality mild steel construction
• Mandrel-bent pipework for smooth exhaust gas flow
• Strong welded construction for durability
• Heat-resistant painted finish rated to approximately 600°C
• Precision mounting flanges for reliable sealing

Additional Options

• DSF084: Replacement exhaust manifold/header gasket available separately
• TYB202: Replacement exhaust mounting rubber available separately
• TYR019: Replacement exhaust mounting rubber available separately

Vehicle Fitment

• Make: Toyota
• Model: LandCruiser 100 Series
• Chassis: FZJ100
• Engine: 1FZ-FE DOHC inline six-cylinder petrol
• Capacity: 4.5L / 4477cc
• Year Range: 1998–2007

Fitment Notes

• Designed as a direct-fit header set for the applicable FZJ100 4.5L 1FZ-FE application
• No cutting or exhaust fabrication is normally required for a standard vehicle
• Check existing exhaust components, mounting hardware and engine mounts before installation
• Replacement manifold/header gasket – see DSF084
• Please confirm your LandCruiser is an FZJ100 fitted with the 4.5L 1FZ-FE petrol engine before ordering

What’s Included

• Wildcat WILD242 header / extractor assembly

Recommended With

• DSF084 exhaust manifold/header gasket
• TYB202 exhaust mounting rubber
• TYR019 exhaust mounting rubber
• Replacement manifold studs and nuts where existing hardware is worn or corroded
• Free-flowing exhaust system for further reduction in exhaust restriction

Why Good Headers & Exhaust Systems Matter

At 4,000 rpm, the 4.5L 1FZ-FE engine draws in approximately 8,954 litres of intake air per minute and expels around 26,860 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

Apply penetrating lubricant such as WD-40 or similar to the manifold studs, nuts and exhaust fasteners before removal. Inspect the existing manifold studs, exhaust mounts and connecting hardware before installation. Trial-fit the header and exhaust connection before fully tightening the system, and protect the painted surfaces during installation to minimise scratching or damage.

Warranty & Compliance

Wildcat headers are covered by the manufacturer's warranty subject to standard warranty terms and conditions.

Installation must retain the catalytic converter, oxygen sensors and any other emissions-control equipment required for the vehicle. Exhaust and emissions requirements vary between Australian states and territories, and the completed installation must comply with the regulations applicable in your state or territory.

FAQ

What Toyota LandCruiser does WILD242 suit?
WILD242 is designed for the Toyota LandCruiser 100 Series FZJ100 fitted with the 4.5L 1FZ-FE DOHC petrol engine from 1998 to 2007.

Are WILD242 headers a direct fit?
Yes. WILD242 is designed as a direct-fit header set for the applicable FZJ100 4.5L 1FZ-FE application. No cutting or exhaust fabrication is normally required on a standard vehicle.

What size are the header pipes?
WILD242 uses 1.58" primary pipes, 2.00" secondary pipes and a 2.50" outlet.

What gasket is required?
The recommended replacement exhaust manifold/header gasket is DSF084, available separately.

Are replacement exhaust mounting rubbers available?
Yes. TYB202 and TYR019 exhaust mounting rubbers are available separately.

Are these suitable for touring and towing?
Yes. The interference-style design is intended to improve exhaust flow and usable torque across the normal operating range, making WILD242 suitable for street, touring, towing and off-road applications.

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.

Customer Support

For phone orders, fitment advice or product enquiries, contact Best Mufflers:

Call Now: +61 2 9547 3511 Email Us

Best Mufflers
87A Planthurst Road, Carlton NSW 2218, Australia
Monday–Friday 8:00am–5:00pm by appointment
Exhaust Systems Since 1983