Pacemaker PH2555 Headers – Chrysler VC Valiant 340-360 V8 Conversion

Pacemaker PH2555 headers (extractors) are designed for Chrysler VC Valiant V8 conversion projects using 340 or 360 Mopar small-block engines fitted with J-Heads. These precision-engineered headers improve exhaust flow, increase torque, sharpen throttle response and deliver a stronger exhaust note. A great choice for Mopar small-block street builds, restorations and classic Chrysler Valiant V8 performance upgrades.

Key Features

• Mandrel-bent 45mm primary pipes, 51mm secondary pipes, and 76mm flanged outlets
• Thick machined flanges for durability and leak-free sealing
• Smooth merge collectors for improved exhaust scavenging and power delivery
• Pacemaker Blue heat-resistant coating rated to 800°C

Construction

• High-quality mild steel tubing for strength and durability
• Precision welded construction for consistent fitment
• Australian manufactured Pacemaker performance design

Additional Options

• Ceramic Coating: Available under product code PHC10
• Gasket: Recommended gasket PHF2555

Fitment Notes

• Designed for Chrysler VC Valiant V8 conversion applications
• J Heads are identified by a "J" stamped on pads above the spark plugs
• Automatic column-shift linkages may require modification
• Designed for automatic transmission vehicles only
• Requires engine mount conversion using Tuff Mounts TM304
• Gearbox mount required: Tuff Mount TMG028
• Protect painted surfaces and wrap headers during trial fitting
• Clearance may vary depending on engine mounts, steering or aftermarket components
• These headers are not pipe-over-cone design

What’s Included

• Pacemaker PH2555L left header assembly
• Pacemaker PH2555R right header assembly
• Header bolts [12]
• Flanges and gaskets to connect to exhaust system

Recommended With

• Exhaust gasket set PHF2555
• Tuff Mount engine mounts TM304
• Tuff Mount gearbox mount TMG028
• Matching intermediate pipes or exhaust system components may be available – contact us

Why Good Headers & Exhaust Systems Matter

• A Chrysler 360 V8 engine draws in approximately 12,500 litres of air per minute and expels around 37,500 litres of exhaust gas per minute at 5,000 rpm [@600°C]. Efficient header design plays a major role in allowing this volume of exhaust gas to exit the engine smoothly.

Warranty & Compliance

• Backed by Pacemaker 2-year manufacturer warranty
• No emissions compliance note required for these pre-1986 applications

Frequently Asked Questions

What vehicles do these headers suit?
Pacemaker PH2555 headers are designed for Chrysler VC Valiant V8 conversion projects using 340 or 360 Mopar small-block engines fitted with J-Heads.

How do I identify J Heads?
J Heads have the letter “J” stamped on the raised pads above the spark plug holes.

Are special engine mounts required?
Yes. These headers require Tuff Mount TM304 engine mounts and TMG028 gearbox mount for proper fitment.

Do they fit manual transmission vehicles?
No. Pacemaker PH2555 headers are designed for automatic transmission vehicles only.

Are gaskets included?
Header gaskets are not included. The recommended gasket for this application is PHF2555.

Can these headers be ceramic coated?
Yes. Ceramic coating is available separately under product code PHC10.

Customer Support

For phone orders, advice, or part enquiries – contact us: