Holden Commodore VN VP VR 5.0L 304 V8 Manual Headers – Wildcat WILD034M

Wildcat WILD034M exhaust headers (extractors) are designed for Holden Commodore VN, VP and VR models fitted with the 5.0L / 304 Holden EFI V8 and manual transmission.

Featuring an interference-style design, WILD034M replaces the restrictive factory exhaust manifolds with larger, smoother-flowing pipework designed to improve exhaust gas flow and scavenging. Reducing exhaust restriction can improve torque, throttle response and overall engine performance while giving the Holden 5.0L V8 a stronger exhaust note.

WILD034M is designed to connect directly to the factory catalytic converters. During installation the knock sensor must be relocated to the opposite side. The headers are also designed to suit vehicles fitted with variable power steering.

Please check availability before ordering.

Key Features

• Designed for Holden Commodore VN, VP and VR
• Suits the 5.0L / 304 Holden EFI V8
• Designed for manual transmission applications
• Interference-style design for street performance
• 1.58" (approximately 40mm) primary pipes
• 1.75" (approximately 45mm) secondary pipes
• 2.50" (approximately 63mm) outlets
• Designed to connect directly to the factory catalytic converters
• Suitable for vehicles with variable power steering
• Designed to improve exhaust flow, torque, throttle response and engine performance

Construction

• Australian-made Wildcat performance headers
• Quality mild steel construction
• Strong welded construction for durability
• Heat-resistant painted finish rated to approximately 600°C
• Heavy-duty cylinder-head mounting flanges

Additional Options

• DSF063: Replacement exhaust manifold/header gaskets available separately
• Replacement manifold studs, nuts and exhaust hardware available where required

Vehicle Fitment

• Make: Holden
• Model: Commodore
• Series: VN / VP / VR
• Engine: Holden EFI V8 / 304
• Capacity: 5.0L / 4987cc
• Transmission: Manual

Fitment Notes

• Designed for Holden Commodore VN, VP and VR 5.0L / 304 EFI V8 manual applications
• Designed to connect directly to the factory catalytic converters
• Knock sensor must be relocated to the opposite side during installation
• Will fit vehicles equipped with variable power steering
• Replacement exhaust manifold/header gaskets – see DSF063
• Vehicle modifications, engine conversions, transmission conversions, aftermarket steering components or non-standard engine mounts may affect clearance and fitment
• Please check availability before ordering.

What’s Included

• 1 x Pair Wildcat WILD034M headers / extractors

Recommended With

• DSF063 exhaust manifold/header gaskets
• Replacement manifold studs and nuts where existing hardware is worn or corroded
• New exhaust flange hardware where required
• Quality performance exhaust system where further exhaust flow improvement is required

Why Good Headers & Exhaust Systems Matter

At 4,000 rpm, the 4987cc Holden 5.0L V8 draws in approximately 9,974 litres of intake air per minute and expels around 29,920 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 both headers and check engine, transmission, steering and body clearance before final tightening. Relocate the knock sensor to the opposite side as required for header clearance. Inspect the factory catalytic converter connections and exhaust hardware before installation and replace damaged or corroded components where required.

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 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 vehicles do WILD034M headers suit?
WILD034M is designed for Holden Commodore VN, VP and VR models fitted with the 5.0L / 304 Holden EFI V8 and manual transmission.

Do WILD034M headers connect to the factory catalytic converters?
Yes. WILD034M is designed to connect directly to the factory catalytic converters on the applicable original vehicle configuration.

Does the knock sensor need to be moved?
Yes. The knock sensor must be relocated to the opposite side to provide the required header clearance.

Will WILD034M fit variable power steering?
Yes. WILD034M is listed as suitable for vehicles fitted with variable power steering.

What size are the WILD034M header pipes?
WILD034M uses 1.58" primary pipes, 1.75" secondary pipes and 2.50" outlets.

What exhaust gaskets are required?
The recommended replacement exhaust manifold/header gasket is DSF063, available separately.

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