Toyota LandCruiser HZJ80R 1990-1998 4.2L 1HZ Diesel Wildcat Exhaust Headers WILD119

Wildcat WILD119 exhaust headers (extractors) are designed for selected Toyota LandCruiser HZJ80R models from 1990–1998 fitted with the 4.2L 1HZ naturally aspirated diesel engine.

WILD119 features a Tri-Y header design with mandrel-bent 38mm (1.50") primary pipes, 51mm (2.00") secondary pipes and a 63mm (2.50") slip outlet. This configuration is designed to improve exhaust gas flow and scavenging, helping the 1HZ engine produce better throttle response and usable low- and mid-range torque for touring, towing and 4WD applications.

WILD119 is the short-set header application, with the headers running outside the chassis on applicable LandCruiser wagons. It is listed for manual and automatic transmissions and vehicles equipped with air conditioning and power steering.

Important: Wildcat strongly recommends that the vehicle be retuned after fitting WILD119 to ensure correct fuel mixtures. The engine may run lean with headers fitted, which can increase exhaust temperatures and potentially cause header pipe cracking.

Please check availability and current lead time before ordering.

Key Features

• Designed for selected Toyota LandCruiser HZJ80R 1990–1998 applications
• Suits the 4.2L 1HZ naturally aspirated diesel engine
• Tri-Y header design
• Mandrel-bent pipework
• 38mm (1.50") primary pipes
• 51mm (2.00") secondary pipes
• 63mm (2.50") slip outlet
• Short-set header configuration
• Outside-chassis fitment on applicable LandCruiser wagons
• Suits manual and automatic transmissions
• Suits vehicles equipped with air conditioning
• Suits vehicles equipped with power steering
• Designed to improve exhaust gas flow and scavenging
• Helps improve torque, throttle response and engine performance
• Australian-made Wildcat performance headers

Construction

• 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
• Australian manufactured by Wildcat

Additional Options

• RBG041S exhaust manifold/header gasket
• Replacement manifold studs and nuts where existing hardware is worn or corroded
• High-temperature exhaust gasket sealant where appropriate
• Performance exhaust system where further exhaust flow improvement is required
• Fuel-system tuning after header installation

Vehicle Fitment

• Make: Toyota
• Model: LandCruiser 80 Series
• Chassis: HZJ80R
• Year Range: 1990–1998
• Engine Capacity: 4.2L / 4164cc
• Engine: 1HZ
• Engine Configuration: Inline 6-cylinder naturally aspirated diesel
• Transmission: Manual / Automatic
• Air Conditioning: Suitable
• Power Steering: Suitable

Fitment Notes

• Designed for selected Toyota LandCruiser HZJ80R models from 1990–1998 fitted with the 4.2L 1HZ diesel engine
• WILD119 is the short-set header application
• Headers run outside the chassis on applicable LandCruiser wagons
• Suits manual and automatic transmissions
• Suits vehicles equipped with air conditioning and power steering
• Recommended exhaust manifold/header gasket: RBG041S
• Wildcat strongly recommends retuning the vehicle after installation to ensure the correct fuel mixture
• A lean fuel mixture may increase exhaust gas temperatures and can contribute to header pipe cracking
• Engine conversions, replacement engines or modified exhaust systems may affect fitment
• Please check availability and current lead time before ordering.

What’s Included

• 1 x Set Wildcat WILD119 exhaust headers / extractors
• Outlet components as supplied

Recommended With

• RBG041S exhaust manifold/header gasket
• Replacement manifold studs and nuts where existing hardware is worn or corroded
• High-temperature exhaust gasket sealant where appropriate
• Quality performance exhaust system where further exhaust flow improvement is required
• Fuel-system check and tuning after installation

Why Good Headers & Exhaust Systems Matter

At 4,000 rpm, the 4.164L 1HZ diesel engine theoretically draws in approximately 8,328 litres of intake air per minute and can expel around 25,000 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
• Remove all traces of the old manifold gasket before installing the headers
• Inspect the cylinder-head sealing surface, manifold studs and threads before installation
• Fit a new RBG041S exhaust manifold/header gasket
• Trial-fit the headers before fully tightening the mounting hardware
• Check clearance around the chassis, engine mounts, steering, transmission and surrounding components
• Protect the painted header surfaces during trial fitting and installation
• Check all exhaust connections for leaks after installation
• Inspect and re-tighten the header mounting hardware after the initial heat cycles
• Have the fuel mixture checked and correctly adjusted after installation as recommended by Wildcat

Warranty & Compliance

Wildcat headers are covered by the applicable 2-year manufacturer's warranty subject to standard warranty terms and conditions.

Correct engine tune is particularly important with this application. Wildcat advises that the 1HZ fuel mixture should be checked and adjusted after fitting WILD119, as an excessively lean condition may increase exhaust temperatures and contribute to header pipe damage.

FAQ

Which Toyota LandCruiser models does WILD119 suit?
WILD119 is designed for selected Toyota LandCruiser HZJ80R models from 1990–1998 fitted with the 4.2L 1HZ naturally aspirated diesel engine.

Is WILD119 the short-set header?
Yes. Wildcat identifies WILD119 as the short-set header application, with outside-chassis fitment on applicable LandCruiser wagons.

What size are the WILD119 header pipes?
WILD119 uses 38mm (1.50") primary pipes, 51mm (2.00") secondary pipes and a 63mm (2.50") slip outlet.

Are WILD119 headers mandrel bent?
Yes. The Wildcat application specifies mandrel-bent pipework.

Does WILD119 suit manual and automatic transmissions?
Yes. WILD119 is listed for both manual and automatic transmission applications.

Does WILD119 suit air conditioning and power steering?
Yes. WILD119 is listed for LandCruisers equipped with air conditioning and power steering.

Does the 1HZ need to be retuned after fitting WILD119?
Wildcat strongly recommends checking and correcting the fuel mixture after installation. The engine may run lean with the headers fitted, which can increase exhaust temperatures and potentially contribute to header pipe cracking.

Which exhaust gasket is required?
The recommended exhaust manifold/header gasket is RBG041S.

What finish is used on WILD119?
The headers have a heat-resistant painted finish rated to approximately 600°C.

Are WILD119 headers Australian made?
Yes. Wildcat WILD119 headers are manufactured in Australia.

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, 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