Toyota Hilux GGN15R GGN25R 4.0L 1GR-FE Headers – Wildcat WILD277

Wildcat WILD277 exhaust headers (extractors) are designed for the Toyota Hilux GGN15R and GGN25R 4WD fitted with the 4.0L V6 1GR-FE petrol engine from 2005 to June 2015.

WILD277 replaces the restrictive factory exhaust manifolds with larger, smoother-flowing pipework designed to improve exhaust gas flow and scavenging. The mandrel-bent construction maintains a consistent internal pipe diameter through the bends, helping reduce restriction and improve torque, throttle response and overall engine performance.

Installation requires the original catalytic converters to be cut from the factory exhaust and welded to the new header connections. Professional exhaust installation is recommended.

Key Features

• Designed for Toyota Hilux GGN15R and GGN25R 4WD
• Suits the 4.0L V6 1GR-FE petrol engine
• 1.58" primary pipes
• 2.25" outlets
• Mandrel-bent pipework for smooth exhaust gas flow
• Designed to retain the original catalytic converters after modification
• Designed to improve exhaust flow, torque, throttle response and engine performance

Construction

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

Additional Options

• Replacement exhaust gaskets and mounting hardware can be supplied where required
• Free-flowing exhaust system can be fitted to further reduce exhaust restriction

Vehicle Fitment

• Make: Toyota
• Model: Hilux
• Chassis: GGN15R / GGN25R
• Engine: 1GR-FE V6 petrol
• Capacity: 4.0L
• Drivetrain: 4WD
• Year Range: 2005–06/2015

Fitment Notes

• Suits 4WD models only
• Not a direct-fit installation – cutting and welding is required
• The original catalytic converters must be cut from the factory exhaust and welded to the new header connections
• Original exhaust manifold gaskets may be reused if they are in serviceable condition; replacement is recommended where required
• Professional exhaust installation and welding is recommended
• Please confirm your Hilux is fitted with the 4.0L 1GR-FE V6 before ordering

What’s Included

• Wildcat WILD277 header / extractor assemblies

Recommended With

• Replacement exhaust manifold/header gaskets where required
• Replacement manifold studs and nuts where existing hardware is worn or corroded
• Professional exhaust fabrication and welding
• Free-flowing exhaust system for further reduction in exhaust restriction

Why Good Headers & Exhaust Systems Matter

At 4,000 rpm, the 4.0L 1GR-FE V6 draws in approximately 8,000 litres of intake air per minute and expels around 24,000 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. The factory catalytic converters need to be carefully cut from the original exhaust and positioned for connection to the new headers. Trial-fit the complete system before final welding and tightening. Protect the painted header 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 converters, oxygen sensors and 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 Hilux does WILD277 suit?
WILD277 is designed for the Toyota Hilux GGN15R and GGN25R 4WD fitted with the 4.0L V6 1GR-FE petrol engine from 2005 to June 2015.

Will WILD277 fit a 2WD Hilux?
No. This application is listed for 4WD models only.

Are WILD277 headers a direct fit?
No. Installation requires cutting and welding. The original catalytic converters must be cut from the factory exhaust and welded to the new header connections.

Are the original catalytic converters retained?
Yes. The factory catalytic converters are retained, but they must be cut from the original exhaust and welded into the required position during installation.

What size are the header pipes?
WILD277 uses 1.58" primary pipes and 2.25" outlets. No separate secondary pipe size is specified for this design.

Are new manifold gaskets required?
The original manifold gaskets may be reused if they remain in good serviceable condition. We recommend inspecting them during installation and replacing them if there is any sign of damage, deterioration or leakage.

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