Toyota LandCruiser HJ47 HJ60 HJ75 1980-1990 4.0L 2H Diesel Pacemaker Headers PH12640

Pacemaker PH12640 exhaust headers (extractors) are designed for selected Toyota LandCruiser HJ47, HJ60 and HJ75 models fitted with the 4.0L 2H diesel engine.

Replacing the restrictive factory exhaust manifold, PH12640 features mandrel-bent 42mm primary pipes, 48mm secondary pipes and a 57mm outlet. The system is designed to improve exhaust gas flow and scavenging for better torque, throttle response and engine performance.

Important: PH12640 uses an inside-chassis design. Left Hand Drive compatibility should be confirmed before ordering.

Key Features

• Designed for selected Toyota LandCruiser HJ47, HJ60 & HJ75 applications
• Suits the 4.0L 2H diesel engine
• Mandrel-bent 42mm primary pipes
• 48mm secondary pipes
• 57mm outlet
• Inside-chassis fitment
• Thick machined flanges for durability and reliable sealing
• Smooth collector design for improved exhaust gas flow and scavenging

Construction

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

Additional Options

• PHC70 Ceramic Coating: Optional ceramic coating for improved heat management, surface durability and corrosion resistance
• DSF053: Recommended exhaust manifold/header gasket available separately
• Matching exhaust components may be available separately – contact Best Mufflers for advice
• Professional fitting service available – contact Best Mufflers to arrange installation

Vehicle Fitment

• Toyota LandCruiser HJ47: 4.0L 2H diesel – approximately 10/1980 to 12/1984
• Toyota LandCruiser HJ60: 4.0L 2H diesel – approximately 11/1980 to 04/1990
• Toyota LandCruiser HJ75: 4.0L 2H diesel – approximately 11/1984 to 03/1990
• Engine: Toyota 2H
• Capacity: 4.0L / 3980cc
• Configuration: Inline 6 Diesel

Header Specifications

• Part Number: PH12640
• Primary Pipe Size: 42mm
• Secondary Pipe Size: 48mm
• Outlet Size: 57mm
• Fitment: Inside chassis

Fitment Notes

• Designed for selected Toyota LandCruiser HJ47, HJ60 and HJ75 models fitted with the 4.0L 2H diesel engine
• HJ45 is not included in this listing because Australian HJ45 models used the earlier H diesel rather than the 2H
• Inside-chassis fitment
• Left Hand Drive compatibility should be confirmed before ordering
• Confirm the vehicle chassis and engine before ordering, particularly where an engine conversion has been carried out
• Protect the Pacemaker Blue or optional ceramic-coated surfaces during trial fitting and installation
• Check clearance around engine mounts, steering components, starter motor and surrounding components during installation
• Clearance may vary where non-original engine mounts, steering components or aftermarket parts have been fitted
• Please check availability and current lead time before ordering.

What’s Included

• 1 x Pacemaker PH12640 header assembly

Recommended With

• DSF053 exhaust manifold/header gasket
• Matching intermediate pipes, joiners or adaptors where required
• Matching performance exhaust system where further exhaust flow improvement is required
• PHC70 ceramic coating where additional heat management is desired

Why Good Headers & Exhaust Systems Matter

At 4,000 rpm, the 3980cc Toyota 2H six-cylinder diesel engine theoretically draws in approximately 7,960 litres of intake air per minute and can expel around 23,880 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 to manifold fasteners and exhaust connections before removal
• Remove all traces of the original manifold gasket and inspect the cylinder-head sealing surface
• Fit a new DSF053 exhaust manifold/header gasket
• Trial-fit the header before fully tightening the mounting hardware
• Protect the Pacemaker Blue or optional ceramic-coated surfaces during trial fitting and installation
• Pay particular attention to steering and chassis clearance due to the inside-chassis design
• Check clearance around engine mounts, starter motor, wiring and other surrounding 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 PH12640 headers are backed by Pacemaker's 2-year manufacturer warranty, subject to the manufacturer's current warranty terms and conditions.

For later vehicles in this application range, the completed exhaust system must retain any emissions-control equipment required for the vehicle and comply with applicable roadworthiness, emissions and exhaust noise requirements.

FAQ

Which LandCruisers do Pacemaker PH12640 headers fit?
PH12640 is designed for selected Toyota LandCruiser HJ47, HJ60 and HJ75 models fitted with the 4.0L 2H diesel engine.

Does PH12640 fit the HJ45?
The Australian HJ45 was fitted with the earlier H diesel engine rather than the 2H. The 2H application begins with models including the HJ47, so HJ45 has not been included in this listing.

What years does PH12640 cover?
The 2H-powered applications span approximately 1980 to 1990, depending on chassis. HJ47 is approximately 1980-1984, HJ60 approximately 1980-1990 and HJ75 approximately 1984-1990.

Do PH12640 headers run inside the chassis?
Yes. PH12640 uses an inside-chassis fitment.

Will PH12640 fit a Left Hand Drive LandCruiser?
Left Hand Drive compatibility should be confirmed before ordering because steering position and inside-chassis clearance can affect fitment.

What size are the PH12640 header pipes?
PH12640 uses 42mm primary pipes, 48mm secondary pipes and a 57mm outlet.

Which exhaust gasket is recommended?
The recommended exhaust manifold/header gasket is DSF053, available separately.

Can PH12640 headers be ceramic coated?
Yes. PHC70 ceramic coating is available as an optional upgrade. Please contact us for current 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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