Ford Falcon BA BF XR8 GT 2002-2008 5.4L BOSS V8 Pacemaker Headers PH4018

Pacemaker PH4018 headers (extractors) are designed for Ford Falcon BA and BF XR8 and GT models fitted with the 5.4L 4-valve BOSS V8 engine. Designed as a vehicle-specific performance upgrade, PH4018 replaces the restrictive factory exhaust manifolds with Pacemaker's Tri-Y header design.

PH4018 features 44mm (1¾") primary pipes, 51mm (2") secondary pipes and 63mm (2½") flanged outlets. The Tri-Y configuration is designed to improve exhaust-gas scavenging and flow while providing strong usable torque and throttle response for street and performance applications.

Please check availability and current lead time before ordering.

Key Features

• Designed for Ford Falcon BA-BF XR8 and GT 5.4L 4-valve BOSS V8 applications
• Pacemaker Tri-Y design
• 44mm (1¾") primary pipes
• 51mm (2") secondary pipes
• 63mm (2½") flanged outlets
• Mandrel-bent pipework
• Manual and automatic transmission compatible
• Power steering compatible
• Air conditioning compatible
• Oxygen sensor provision
• Designed to improve exhaust flow, scavenging, torque, throttle response and engine performance

Construction

Pacemaker PH4018 headers use mandrel-bent pipework and a vehicle-specific Tri-Y design developed for the Ford Falcon BA-BF 5.4L 4-valve BOSS V8 application.

The standard headers are supplied in Pacemaker's protective finish. Ceramic coating is also available separately for customers wanting additional heat management and corrosion protection.

Additional Options

• Ceramic Coating: Available separately – please contact us for current coating options, pricing and lead time
• Header Gaskets: PHFG4008 – available separately
• High-Flow Catalytic Converters: CAT4018 high-flow catalytic converter options are available – contact us to confirm the correct configuration
• Matching performance exhaust system components – available separately

Vehicle Fitment

• Make: Ford
• Model: Falcon
• Series: BA / BF
• Years: 2002-2008
• Models: XR8 / GT
• Engine Capacity: 5.4L
• Engine: BOSS V8
• Cylinder Heads: 4-Valve / Quad Cam
• Fuel: Petrol
• Transmission: Manual / Automatic

Header Specifications

• Part Number: PH4018L/R
• Design: Tri-Y
• Primary Pipe: 44mm (1¾")
• Secondary Pipe: 51mm (2")
• Outlet: 63mm (2½")
• Power Steering: Yes
• Air Conditioning: Yes
• Oxygen Sensor: Yes
• EGR: N/A
• Recommended Gasket: PHFG4008
• Approximate Fitting Time: 4 hours

Fitment Notes

• Designed for Ford Falcon BA-BF XR8 and GT models fitted with the 5.4L 4-valve BOSS V8 engine.
• Suits manual and automatic transmission applications.
• Power steering and air conditioning compatible.
• Oxygen sensor provision is incorporated into the application.
• Confirm engine and vehicle configuration before ordering where modifications or engine conversions have been carried out.
• Protect painted or 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.
• Check clearance around the starter motor, steering, wiring and surrounding components during installation.
• Clearance may vary where non-original engine mounts, steering components or other aftermarket parts have been fitted.
• Ensure oxygen sensors, catalytic converters and other required emissions-control equipment are correctly retained.
• Professional installation is recommended.

What's Included

• Pacemaker PH4018L left-hand header assembly
• Pacemaker PH4018R right-hand header assembly

Gaskets, bolts, outlet flanges and other installation hardware should not be assumed included unless specifically confirmed with the current PH4018 package supplied.

Recommended With

• PHFG4008: Exhaust manifold/header gaskets
• CAT4018: Matching high-flow catalytic converter options – contact us to confirm the correct configuration
• Matching performance exhaust system components

Why Good Headers & Exhaust Systems Matter

At 4,000 rpm, the 5.4L BOSS V8 theoretically draws approximately 10,800 litres of intake air per minute at 100% volumetric efficiency and expels around 32,400 litres of hot exhaust gas per minute at approximately 600°C.

Actual airflow varies with RPM, engine load, volumetric efficiency, intake restriction, camshaft specification and engine condition. These figures are theoretical values intended to illustrate the substantial volume of gas that must pass through the exhaust system at higher engine speeds.

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 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 new PHFG4008 exhaust manifold/header gaskets.
• Trial-fit both header assemblies and check all clearances before fully tightening the mounting hardware.
• Protect painted or ceramic-coated surfaces during trial fitting and installation.
• Check clearance around the starter motor, steering, engine mounts, transmission, wiring and surrounding components.
• Ensure oxygen sensors, catalytic converters and other required emissions-control equipment are correctly retained.
• Keep oxygen sensor wiring and other wiring clear of the headers and other hot exhaust components.
• Check all exhaust connections for leaks after installation.
• Inspect header mounting hardware after the initial heat cycles.

Warranty & Compliance

Pacemaker PH4018 headers are covered against manufacturing defects subject to Pacemaker's current warranty terms and conditions.

The vehicle's catalytic converters, oxygen sensors and other emissions-control equipment must remain correctly installed and operational where required. Check applicable state or territory requirements covering exhaust modifications, emissions, vehicle noise and roadworthiness.

FAQ

What vehicles do PH4018 headers suit?
Pacemaker PH4018 headers are designed for Ford Falcon BA and BF XR8 and GT models fitted with the 5.4L 4-valve BOSS V8 engine.

Are PH4018 headers Tri-Y?
Yes. Pacemaker currently specifies PH4018 as a Tri-Y design.

What size are the PH4018 header pipes?
PH4018 uses 44mm (1¾") primary pipes, 51mm (2") secondary pipes and 63mm (2½") outlets.

What is the difference between PH4018 and PH4008?
Both suit the BA-BF 5.4L 4-valve BOSS V8, but the header designs are different. PH4018 is a Tri-Y design using 44mm primaries, 51mm secondaries and 63mm outlets. PH4008 is Pacemaker's TUNED design using 44mm primaries feeding 63mm outlets. Contact us if you need help selecting the most suitable header for your vehicle and intended use.

Do PH4018 headers suit manual and automatic transmissions?
Yes. Pacemaker specifies PH4018 for both manual and automatic transmission applications.

Do PH4018 headers suit power steering and air conditioning?
Yes. Pacemaker specifies compatibility with both power steering and air conditioning.

Which header gaskets are recommended?
Pacemaker currently specifies PHFG4008 for PH4018.

Are high-flow catalytic converters available?
Yes. Pacemaker high-flow catalytic converter options are available for this application. Please contact us to confirm the correct CAT4018 configuration for your headers and exhaust system.

Can these headers be ceramic coated?
Yes. Ceramic coating is available as an optional upgrade. Please contact us for current coating options, pricing and lead time.

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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