Holden Commodore VT VX VY VZ 5.7L LS1 6.0L LS2 Pacemaker Headers PH5361

Pacemaker PH5361 headers (extractors) are designed for selected Holden Commodore VT Series II, VX, VU, VY and VZ models fitted with the 5.7L LS1 Gen III or 6.0L LS2 V8, with corresponding WH, WK and WL Statesman/Caprice applications.

PH5361 uses Pacemaker's tuned design with 44mm (1¾") primary pipes and 76mm (3") outlets. Pacemaker specifically lists PH5361 for modified engines and supercharged applications, providing increased exhaust-flow capacity for performance LS-powered vehicles.

IMPORTANT – PH5361 is supplied in different vehicle-specific configurations. The correct version must be selected for VT-VY Series I, VY Series II, VZ 5.7L or VZ 6.0L applications because oxygen sensor wiring requirements differ.

Does NOT suit AWD Adventra or Cross 8 models. Pacemaker PH5366 is the applicable AWD header.

Please check availability and current lead time before ordering.

Key Features

• Pacemaker tuned header design
• 44mm (1¾") primary pipes
• 76mm (3") outlets
• Designed for modified and supercharged applications
• Suits selected 5.7L LS1 Gen III and 6.0L LS2 V8 applications
• Manual and automatic transmission compatible
• Power steering compatible
• Factory air conditioning compatible
• Oxygen sensor provision
• Vehicle-specific oxygen sensor loom configurations

Construction

Pacemaker PH5361 uses 44mm (1¾") primary pipes feeding into 76mm (3") outlets, providing a high-flow header configuration for LS1 and LS2 performance applications.

The standard Pacemaker finish uses the distinctive Pacemaker Blue heat-resistant coating, designed to withstand temperatures up to approximately 800°C.

Additional Options

Ceramic Coating: PHC40 ceramic coating may be available for improved heat management and corrosion resistance. Please contact Best Mufflers for current availability.

DSF138: Replacement cylinder-head exhaust gaskets are available separately.

Oxygen Sensor Wiring: The correct wiring loom configuration depends on vehicle series and engine. VY Series II, VZ, WK Series II and WL applications require the appropriate PH5361 configuration with oxygen sensor wiring extensions.

Vehicle Fitment

• Holden Commodore VT Series II: 5.7L LS1 Gen III
• Holden Commodore VX: 5.7L LS1 Gen III
• Holden Commodore VU: 5.7L LS1 Gen III
• Holden Commodore VY: 5.7L LS1 Gen III
• Holden Commodore VZ: 5.7L LS1 Gen III
• Holden Commodore VZ: 6.0L LS2 V8
• Statesman / Caprice: Corresponding WH, WK and WL V8 applications
• Transmission: Manual / Automatic
• Drive: Rear-Wheel Drive

VT Series I is not an LS1 application. The LS1 Gen III application begins with VT Series II.

PH5361 Application Variants

VT Series II, VX, VU and VY Series I 5.7L LS1:
Use PH5361 L/R VT-VY Series 1. Pacemaker specifies that this version does not have oxygen sensor wiring loom extensions.

VY Series II Commodore / WK Series II Statesman-Caprice 5.7L LS1:
Use PH5361 L/R VY Series 2. This kit has the oxygen sensor wiring loom extensions required for these models.

VZ Commodore / WL Statesman-Caprice 5.7L LS1:
Use PH5361 L/R VZ 5.7L with the appropriate oxygen sensor wiring loom extensions.

VZ Commodore / WL Statesman-Caprice 6.0L LS2:
Use PH5361 L/R VZ 6L. This version includes the oxygen sensor wiring loom extensions required for the 6.0L application.

Please provide your exact vehicle model, series, engine and build date when ordering so the correct PH5361 configuration can be supplied.

Header Specifications

• Part Number: PH5361 L/R
• Brand: Pacemaker
• Design: Tuned
• Primary Pipe: 44mm (1¾")
• Secondary Pipe: N/A
• Outlet: 76mm (3")
• Power Steering: Yes
• Air Conditioning: Yes
• Oxygen Sensor Provision: Yes
• EGR: N/A
• Replacement Gasket: DSF138
• Approximate Fitting Time: 3 hours

PH5361 vs PH5363

PH5361: Tuned design with 44mm (1¾") primary pipes and 76mm (3") outlets.

PH5363: Tuned Competition design with larger 48mm (1⅞") primary pipes and 76mm (3") outlets.

Both use a 3" outlet, but PH5363 increases the primary pipe diameter from 1¾" to 1⅞". The most suitable header depends on the engine combination, power level and intended use.

Fitment Notes

Modified / Supercharged Engines: Pacemaker specifically lists PH5361 as designed for modified engines and supercharged applications.

AWD Models: PH5361 does not suit AWD Adventra or Cross 8 models. Pacemaker specifies PH5366 for these AWD applications.

Oxygen Sensor Wiring: VY Series II, VZ, WK Series II and WL applications require the correct PH5361 configuration with the appropriate oxygen sensor wiring loom extensions.

Existing Modifications: Many VT-VZ LS-powered vehicles have modified engines, catalytic converters and exhaust systems. Check the complete vehicle and exhaust configuration before ordering.

Protect painted surfaces during trial fitting and check steering, starter motor, transmission, engine mount and exhaust clearances before final tightening.

What's Included

• Pacemaker PH5361L left-side header assembly
• Pacemaker PH5361R right-side header assembly

Oxygen sensor wiring extensions vary according to the PH5361 application. Gaskets, catalytic converters, bolts and other installation components should not be assumed to be included unless specifically confirmed for the selected kit.

Recommended With

DSF138 – replacement cylinder-head exhaust gaskets.

Correct oxygen sensor wiring loom – required according to vehicle series and PH5361 variant.

CAT5361-100L/R – Pacemaker high-flow catalytic converter assemblies for compatible PH5361 installations.

A matching Pacemaker performance exhaust system is available for selected Commodore, Statesman/Caprice and HSV applications.

Why Good Headers & Exhaust Systems Matter

At 4,000 rpm, the 5.7L LS1 V8 theoretically draws approximately 11,400 litres of intake air per minute at 100% volumetric efficiency and expels around 34,200 litres of hot exhaust gas per minute at approximately 600°C.

At the same engine speed, the 6.0L LS2 V8 theoretically draws approximately 12,000 litres of intake air per minute and expels around 36,000 litres of hot exhaust gas per minute at approximately 600°C.

Modified and supercharged engines can move substantially more air than these naturally aspirated theoretical figures.

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

Before installation, confirm the exact vehicle series and whether the engine is a 5.7L LS1 or 6.0L LS2.

Confirm the correct PH5361 oxygen sensor wiring configuration before installation, particularly on VY Series II, VZ, WK Series II and WL vehicles.

Check the catalytic converters and downstream exhaust configuration before commencing installation.

Professional installation is recommended.

Warranty & Compliance

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

All catalytic converters, oxygen sensors and other emissions-control equipment required for the vehicle must remain correctly installed and operational.

Installation must comply with applicable Australian state or territory requirements relating to emissions, exhaust noise and vehicle modifications.

FAQ

What vehicles do PH5361 headers fit?
Pacemaker offers PH5361 variants for selected VT Series II, VX, VU, VY and VZ Commodore and corresponding WH, WK and WL Statesman/Caprice applications fitted with the 5.7L LS1 or 6.0L LS2 V8.

Does PH5361 fit the 5.7L LS1?
Yes. PH5361 is available for rear-wheel-drive Commodore and Statesman/Caprice models fitted with the 5.7L LS1 Gen III.

Does PH5361 fit the 6.0L LS2?
Yes. Pacemaker offers PH5361 L/R VZ 6L for applicable VZ Commodore and WL Statesman/Caprice 6.0L LS2 applications.

What size are PH5361 headers?
Pacemaker specifies 44mm (1¾") primary pipes and 76mm (3") outlets.

What is the difference between PH5361 and PH5363?
PH5361 uses 44mm (1¾") primaries, while PH5363 uses larger 48mm (1⅞") primaries. Both use 76mm (3") outlets.

Does PH5361 fit Adventra or Cross 8?
No. Pacemaker specifies PH5366 for AWD Adventra and Cross 8 applications.

Do all PH5361 kits use the same oxygen sensor wiring?
No. The oxygen sensor wiring arrangement varies between VT-VY Series I, VY Series II, VZ 5.7L and VZ 6.0L configurations.

What gasket suits PH5361?
Pacemaker specifies DSF138.

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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