Nissan Navara D40 4.0L V6 VQ40DE Headers – Wildcat WILD708

Wildcat WILD708 exhaust headers (extractors) are designed for the Nissan Navara D40 fitted with the 4.0L V6 VQ40DE petrol engine from 2005 to 2011.

Featuring an interference-style extractor design, WILD708 replaces the restrictive factory exhaust manifolds and is designed to improve exhaust gas flow and scavenging. The larger, smoother-flowing pipework can improve low and mid-range torque, throttle response and overall engine performance, making these headers particularly suited to street, touring and 4WD applications.

Key Features

• Designed for Nissan Navara D40 4.0L V6
• Suits the VQ40DE petrol engine
• Interference-style design for improved exhaust scavenging and street performance
• 1.58" primary pipes
• 2.25" outlets
• Designed to improve exhaust flow, torque, throttle response and engine performance
• Suits manual and automatic transmissions
• Direct-fit design for the applicable vehicle

Construction

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

Vehicle Fitment

• Make: Nissan
• Model: Navara
• Series: D40
• Engine: VQ40DE V6 petrol
• Capacity: 4.0L / 3954cc
• Year: 2005–2011
• Transmission: Manual & Automatic

Fitment Notes

• Direct-fit design for the applicable Navara D40 4.0L VQ40DE
• Suits both manual and automatic transmission models
• Header/manifold gaskets – see RBG708
• Please confirm your Navara is fitted with the 4.0L VQ40DE petrol engine before ordering

What’s Included

• Wildcat WILD708 header / extractor assemblies

Recommended With

• RBG708 exhaust manifold/header gaskets
• Replacement exhaust flange gaskets where required
• Replacement manifold studs and nuts where original 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 4.0L VQ40DE 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. Trial-fit the headers and exhaust connections before fully tightening all fasteners. 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.

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

FAQ

What Nissan Navara does WILD708 suit?
WILD708 is designed for the Nissan Navara D40 fitted with the 4.0L V6 VQ40DE petrol engine from 2005 to 2011.

Do WILD708 headers suit automatic and manual Navaras?
Yes. WILD708 is listed for both manual and automatic transmission applications.

What size are the header pipes?
WILD708 uses 1.58" primary pipes with 2.25" outlets.

What manifold/header gaskets are required?
The recommended gaskets are RBG708.

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