Pacemaker Headers PH4007 – Ford Falcon FG XR8 & GT 5.4L 4V BOSS V8

Pacemaker PH4007 headers (extractors) are a performance upgrade designed for Ford Falcon FG XR8 and GT models fitted with the 5.4L 4V BOSS V8 engine. Their 4-1 tuned-length design and mandrel-bent pipework provide increased exhaust gas flow and improved scavenging compared with restrictive factory exhaust manifolds.

Featuring 45mm primary pipes and 63mm flanged outlets, PH4007 headers are designed to increase usable torque, sharpen throttle response and improve overall engine breathing and performance. They are an excellent upgrade for street performance vehicles, modified BOSS V8 engines and weekend cruisers.

Key Features

• 4-1 tuned-length design for improved exhaust flow and performance
• Mandrel-bent 45mm primary pipes
• Large 63mm flanged outlets
• Mandrel-bent pipework maintains consistent internal diameter through bends
• Thick machined flanges for strength, durability and reliable sealing
• Smooth collectors designed to improve exhaust scavenging and gas flow
• Designed to improve torque, throttle response and overall engine performance

Vehicle Fitment

• Make: Ford
• Model: Falcon FG
• Variants: XR8 / GT
• Engine: 5.4L BOSS V8
• Cylinder Heads: 4-Valve

Construction

• High-quality steel tubing for strength and long service life
• Mandrel-bent pipework for consistent exhaust flow
• Precision welded construction for strength and accurate fitment
• Pacemaker Blue heat-resistant finish rated to approximately 800°C
• Australian manufactured Pacemaker performance headers

Additional Options

• Ceramic Coating: Available separately under product code "PHC30" for improved heat management and corrosion resistance
• Header Gasket: Recommended gasket "DSF813" available separately

Fitment Notes

• Designed for Ford Falcon FG XR8 and GT models fitted with the 5.4L 4V BOSS V8 engine.
• Confirm engine configuration before ordering where the vehicle has been modified.
• Protect painted surfaces and wrap the headers during trial fitting to prevent damage to the coating.
• Check starter motor, steering, engine mounts, wiring and surrounding components for adequate clearance during installation.
• Clearance may vary where non-original engine mounts, steering components or other aftermarket parts have been fitted.
• Verify emissions and registration compliance in your state.
• Professional installation is recommended.

What’s Included

• 1 x Pacemaker PH4007L left-hand header assembly
• 1 x Pacemaker PH4007R right-hand header assembly
• 16 x header bolts
• Outlet flanges and gaskets for connection to the exhaust system

Recommended With

• Header Gaskets: See product code "DSF813"
• Matching performance exhaust system – available separately

Why Good Headers & Exhaust Systems Matter

• At 5,000 rpm, the 5.4L BOSS V8 draws in approximately 11,475 litres of intake air per minute and expels around 35,000 litres of exhaust gas per minute at approximately 600°C.

Warranty & Compliance

• Backed by Pacemaker's 2-year manufacturer warranty
• Warranty applies according to Pacemaker's current manufacturer terms and conditions
• Verify emissions and registration compliance in your state.
• Installation should provide adequate clearance from wiring, hoses and other heat-sensitive components.

Frequently Asked Questions

What vehicles do PH4007 headers suit?
Pacemaker PH4007 headers are designed for Ford Falcon FG XR8 and GT models fitted with the 5.4L 4V BOSS V8 engine.

What is the PH4007 header design?
PH4007 uses a 4-1 tuned-length design, with the four primary pipes on each bank merging into a single collector. This performance-oriented design provides increased exhaust flow capacity and improved exhaust scavenging.

What size are the PH4007 header pipes?
PH4007 headers use 45mm mandrel-bent primary pipes with 63mm flanged outlets.

Are header gaskets included?
The cylinder-head-to-header gaskets are not included unless specifically selected or stated otherwise. The recommended gasket for this application is DSF813.

Can these headers be ceramic coated?
Yes. Ceramic coating is available separately under product code PHC30 for improved heat management, appearance and corrosion resistance.

Will I need to modify my existing exhaust system?
Depending on the exhaust system currently fitted, connection or fabrication work may be required between the PH4007 outlets and the existing exhaust system. Contact us if you need advice on suitable exhaust components.

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

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