Holden HQ HJ HX HZ WB 396 427 454 Big Block Chev V8 Pacemaker Headers PH5340
$1,259.82
Tax excluded
Pacemaker Headers PH5340 (extractors) | Holden HQ, HJ, H, HZ, WB, 427-454 Big Block Chev. Interference design mandrel-bent 51mm primary pipes, 57mm secondary pipes with 57mm outlets that will improve exhaust flow, torque, and throttle response. Built from high-quality steel with thick flanges and a Pacemaker Blue heat-resistant finish, these headers ensure an excellent, leak-free fit. Ideal for restorations, street performance, and weekend cruising. Click the image for larger views and more photos.
Best Mufflers provides expert advice and fast shipping Australia-wide and internationally.
Pacemaker PH5340 Headers – Holden HQ, HJ, HX, HZ, WB 427 & 454 Big Block Chev
Pacemaker PH5340 headers (extractors) are a great performance upgrade designed for Holden 396 to 496 Big Block Chev engines, fitting HQ, HJ, HX, HX, and WB models. These interference design headers improve exhaust flow, increase 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
- Interference design
- Mandrel-bent 51mm primary pipes 57mm secondary pipes with 76mm 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 (PHC10): Enhanced durability and heat management
- Gasket (DSF075): Available separately for optimal sealing
Fitment Notes
- Linkages on column auto must be modified.
- Will fit with Air-Conditioning
- Fits with original 350 engine mount spacers fitted on correct side. (RH spacer is 1¾"] [LH spacer is 1¼"]
- Will fit turbo 350 & turbo 400 automatic
- Will fit Powerglide automatic.
- Protect painted surfaces and wrap headers during trial fitting
- Clearance may vary with engine mounts, steering, and aftermarket parts
What’s Included
- Pacemaker PH5340 left header assembly
- Pacemaker PH5340 right header assembly
- Header bolts [16]
Recommended With
- New exhaust gasket and sealant
- Matching intermediate pipes, joiners, or adaptors may be available (sold separately)
Why Good Headers and Exhaust Systems Matter
- On average, a 454 big block Chev 350 engine draws ~9,486 L of air per minute and expels ~28,253 L per minute at 3000rpm
Warranty & Compliance
- Backed by Pacemaker 2-year warranty (standard terms apply)
- Check local regulations for emissions and roadworthiness compliance
Customer Support
For phone orders, advice, or part enquiries – contact us:
Pacemaker-Headers-PH5340
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Pacemaker Headers PH5340 (extractors) | Holden HQ, HJ, H, HZ, WB, 427-454 Big Block Chev. Interference design mandrel-bent 51mm primary pipes, 57mm secondary pipes with 57mm outlets that will improve exhaust flow, torque, and throttle response. Built from high-quality steel with thick flanges and a Pacemaker Blue heat-resistant finish, these headers ensure an excellent, leak-free fit. Ideal for restorations, street performance, and weekend cruising. Click the image for larger views and more photos.
Best Mufflers provides expert advice and fast shipping Australia-wide and internationally.