Pacemaker PH5225 Headers – Holden (HQ, HJ, HX, HZ, WB)

Pacemaker Headers  PH5225 (extractors) are a performance upgrade designed for Holden 253 & 308 engines, fitting HQ, HJ, HX, HX, and WB models. These tuned length design competition headers improve exhaust flow, increase low-to-mid range torque, sharpen throttle response, and deliver a stronger exhaust note. Perfect for restorations, street performance, and weekend cruisers, they ensure a tidy, leak-free fit with proven Pacemaker quality.

Key Features

• Competition Headers 
• Mandrel-bent 45mm primary pipes, with 76mm flanged outlets
• Thick, machined flanges for durability and reliable sealing
• Smooth merge collectors for improved scavenging and power delivery

Construction

• High-quality steel tubing with strong welds for long service life
• Pacemaker Blue heat-resistant finish rated to 800°C

Additional Options

• Ceramic Coating (PHC30): Enhanced durability and heat management
• Gasket (DSF009A): Available separately for optimal sealing

Fitment Notes

• Linkages on column auto must be modified. 
• Will not Fit with Air-Conditioning [use PH5210]
• Will fit Turbo 350 & Turbo 400 
• Will fit with HZ type cable clutch
• Will not fit HQ type mechanical clutch
• Will fit with hydraulic clutch conversion
• Protect painted surfaces and wrap headers during trial fitting
• Clearance may vary with engine mounts, steering, and aftermarket parts
• Large Item. Contact Us for freight charges

What’s Included

• Pacemaker PH5225 header assemblies

Recommended With

• Gaskets -  see product code "DSF009A"
• Matching intermediate pipes, joiners, or adaptors (sold separately)

Warranty & Compliance

• Backed by Pacemaker manufacturer warranty (standard terms apply)
• Check local regulations for emissions and roadworthiness compliance

Customer Support

For advice, phone orders, or fitment help:

📞 Call Now: +61 2 9547 3511 ✉️ Email Us

🇦🇺 Best Mufflers
87A Planthurst Road, Carlton NSW 2218, Australia

Exhaust Systems Since 1983