Ford Falcon FG XR8 & GT 5.4L BOSS V8 Pacemaker Headers PH4019

Pacemaker PH4019 exhaust headers (extractors) are designed for selected Ford Falcon FG XR8 and GT models fitted with the 5.4L 4V BOSS Quad Cam V8 engine.

Featuring an interference-style design with 45mm (1.75") primary pipes, 51mm (2.00") secondary pipes and 63mm (2.50") outlets, PH4019 is designed to improve exhaust gas flow and scavenging for better torque, throttle response and usable engine performance.

Key Features

• Designed for selected Ford Falcon FG XR8 & GT applications
• Suits the 5.4L 4V BOSS Quad Cam V8 engine
• Interference-style design for strong street performance
• 45mm (1.75") primary pipes
• 51mm (2.00") secondary pipes
• 63mm (2.50") outlets
• Mandrel-bent pipework for smooth exhaust gas flow
• Thick machined flanges for durability and reliable sealing
• Smooth collector design for improved exhaust scavenging
• Designed to improve torque, throttle response and engine performance
• Australian-made Pacemaker performance headers

Construction

• High-quality steel tubing
• Mandrel-bent pipework
• Strong welded construction for durability
• Thick machined cylinder-head flanges
• Pacemaker Blue heat-resistant finish rated to approximately 800°C
• Australian manufactured by Pacemaker

Additional Options

• PHC30 Ceramic Coating: Optional ceramic coating for improved heat management and surface durability
• PHF4038: Header gaskets available separately
• CAT4018: Compatible high-flow catalytic converters available separately
• Matching performance exhaust system available separately
• Professional fitting service available – contact Best Mufflers to arrange installation

Vehicle Fitment

• Make: Ford
• Model: Falcon
• Series: FG
• Models: XR8 & GT
• Engine: BOSS 4V Quad Cam V8
• Engine Capacity: 5.4L
• Fuel: Petrol

Fitment Notes

• Designed for selected Ford Falcon FG XR8 and GT models fitted with the 5.4L 4V BOSS Quad Cam V8 engine
• Compatible with CAT4018 high-flow catalytic converters
• Recommended header gasket: PHF4038
• Protect the Pacemaker Blue or optional ceramic-coated surfaces during trial fitting and installation
• Check engine mounts before installation, as worn or collapsed mounts can alter engine position and header clearance
• Clearance may vary where engine, steering, suspension or exhaust components have been modified
• Ensure oxygen sensors and catalytic converters are correctly positioned and retained during installation
• Please check availability and current lead time before ordering.

What’s Included

• 1 x Left-hand Pacemaker PH4019 header assembly
• 1 x Right-hand Pacemaker PH4019 header assembly
• Outlet flanges and outlet gaskets for connection to the exhaust system
• 16 header bolts

Recommended With

• PHF4038 header gaskets
• CAT4018 high-flow catalytic converters
• Matching performance exhaust system where further exhaust flow improvement is required
• PHC30 ceramic coating where additional heat management is desired

Why Good Headers & Exhaust Systems Matter

At 4,000 rpm, a 5.4L BOSS V8 theoretically draws in approximately 10,800 litres of intake air per minute and can expel around 32,400 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 manifold studs, bolts and exhaust fasteners before removal
• Remove all traces of the old manifold gaskets and inspect the cylinder-head sealing surfaces
• Fit suitable new PHF4038 header gaskets
• Trial-fit both header assemblies and check all clearances before fully tightening the mounting hardware
• Protect the Pacemaker Blue or optional ceramic-coated surfaces during trial fitting and installation
• Check clearance around the steering, engine mounts, transmission, starter motor and surrounding components
• Ensure oxygen sensors, catalytic converters and other emissions-control equipment are correctly retained
• Check oxygen sensor wiring for adequate clearance from the headers and other hot exhaust components
• Check all exhaust connections for leaks after installation
• Inspect and re-tighten the header mounting hardware after the initial heat cycles

Warranty & Compliance

Pacemaker headers are covered by the manufacturer's applicable warranty 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

Which Ford Falcon does PH4019 suit?
PH4019 is designed for selected Ford Falcon FG XR8 and GT models fitted with the 5.4L 4V BOSS Quad Cam V8 engine.

What type of header is PH4019?
PH4019 uses an interference-style design intended to provide strong street performance and improved exhaust scavenging.

What size are the PH4019 header pipes?
PH4019 uses 45mm (1.75") primary pipes, 51mm (2.00") secondary pipes and 63mm (2.50") outlets.

What is the difference between PH4019 and PH4009?
PH4019 uses an interference design with 45mm primary pipes, 51mm secondary pipes and 63mm outlets, while PH4009 uses a larger tuned-length 4-into-1 competition design with 48mm primary pipes and 76mm outlets.

Which header gaskets are recommended?
The listed header gasket reference for PH4019 is PHF4038.

Are high-flow catalytic converters available?
Yes. CAT4018 high-flow catalytic converters are available separately for the applicable Pacemaker header and exhaust configuration.

Can PH4019 headers be ceramic coated?
Yes. PHC30 ceramic coating is available as an optional upgrade for improved heat management and surface durability. Please contact us for current pricing and lead time.

Are PH4019 headers Australian made?
Yes. Pacemaker PH4019 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

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