Holden Commodore VT VX VY VZ 5.7L LS1 6.0L LS2 Pacemaker Competition Headers PH5362

Pacemaker PH5362 Competition 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.

PH5362 uses Pacemaker's tuned Competition design with large 48mm (1⅞") primary pipes and 90mm (3½") outlets. Pacemaker specifically identifies PH5362 as suitable for modified engines and supercharged applications where increased exhaust-flow capacity is required.

IMPORTANT – PH5362 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 Competition Header
• Tuned design
• 48mm (1⅞") primary pipes
• Large 90mm (3½") 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 PH5362 uses large 48mm (1⅞") primary pipes feeding into substantial 90mm (3½") outlets. The large outlet size distinguishes PH5362 from several other Pacemaker Competition Header options for the VT-VZ LS platform.

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 the vehicle series and engine. Do not assume the same extension loom is suitable for every PH5362 application.

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 was introduced to Commodore with VT Series II.

PH5362 Application Variants

VT Series II, VX, VU and VY Series I 5.7L LS1:
Use the PH5362 L/R VT-VY Series 1 configuration. Pacemaker specifies that this version does not include or require the later-model oxygen sensor wiring loom extensions.

VY Series II Commodore / WK Series II Statesman-Caprice 5.7L LS1:
Use the PH5362 L/R VY Series 2 configuration, which has the appropriate oxygen sensor wiring loom extensions for these models.

VZ Commodore / WL Statesman-Caprice 5.7L LS1:
Use the PH5362 L/R VZ 5.7L configuration with the appropriate oxygen sensor wiring loom extensions.

VZ Commodore / WL Statesman-Caprice 6.0L LS2:
Use the PH5362 L/R VZ 6L configuration designed for the 6.0L LS2 application.

Please provide your exact vehicle model, series, engine and build date when ordering so the correct PH5362 configuration can be supplied.

Header Specifications

• Part Number: PH5362 L/R
• Brand: Pacemaker
• Design: Tuned Competition Header
• Primary Pipe: 48mm (1⅞")
• Secondary Pipe: N/A
• Outlet: 90mm (3½")
• Power Steering: Yes
• Air Conditioning: Yes
• Oxygen Sensor Provision: Yes
• EGR: N/A
• Replacement Gasket: DSF138
• Approximate Fitting Time: 3 hours

PH5362 vs PH5363

PH5362: Tuned Competition Header with 48mm (1⅞") primary pipes and large 90mm (3½") outlets.

PH5363: Tuned Competition Header with the same 48mm (1⅞") primary pipes but smaller 76mm (3") outlets.

The major dimensional difference is therefore the collector outlet: PH5362 uses a 3½" outlet while PH5363 uses a 3" outlet. The correct header should be selected to suit the engine combination, catalytic converter arrangement and downstream exhaust system.

Fitment Notes

Modified / Supercharged Engines: Pacemaker specifically lists PH5362 as designed for modified engines and supercharged applications.

AWD Models: PH5362 does not suit AWD Commodore-based models such as Adventra and Cross 8. Pacemaker specifies PH5366 for these AWD applications.

Oxygen Sensor Wiring: VY Series II, VZ, WK Series II and WL applications require the correct PH5362 configuration with the appropriate oxygen sensor wiring loom arrangement.

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 PH5362L left-side header assembly
• Pacemaker PH5362R right-side header assembly

Oxygen sensor wiring extensions vary according to the PH5362 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 PH5362 variant.

A suitable high-flow catalytic converter and performance exhaust system should be selected to match the 90mm (3½") PH5362 collector outlet and the vehicle's intended use.

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 PH5362 oxygen sensor wiring configuration before installation, particularly on VY Series II, VZ, WK Series II and WL vehicles.

Because PH5362 has a large 90mm (3½") collector outlet, confirm the catalytic converter 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 PH5362 headers fit?
Pacemaker lists PH5362 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 PH5362 fit the 5.7L LS1?
Yes. Pacemaker offers PH5362 configurations for VT Series II through VZ vehicles fitted with the 5.7L LS1 Gen III V8.

Does PH5362 fit the 6.0L LS2?
Yes. Pacemaker has a specific PH5362 configuration for VZ Commodore and WL Statesman/Caprice fitted with the 6.0L LS2 V8.

What size are PH5362 headers?
Pacemaker specifies 48mm (1⅞") primary pipes and 90mm (3½") outlets.

What is the difference between PH5362 and PH5363?
Both use 48mm (1⅞") primary pipes. PH5362 has a larger 90mm (3½") outlet, while PH5363 has a 76mm (3") outlet.

Are PH5362 headers suitable for modified or supercharged engines?
Yes. Pacemaker specifically describes PH5362 as designed for modified engines and supercharged applications.

Does PH5362 fit Adventra or Cross 8 AWD models?
No. Pacemaker specifies PH5366 for Adventra and Cross 8 AWD applications.

Do all PH5362 kits use the same oxygen sensor wiring?
No. Pacemaker separates PH5362 into different configurations for VT-VY Series I, VY Series II, VZ 5.7L and VZ 6.0L because the oxygen sensor wiring requirements differ.

What gasket suits PH5362?
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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