Holden Commodore VE - VF Sedan July 2006 - Oct 2017 Gen IV 6.0 - LS3 6.2
PacemakerRRP$4891.13Holden Commodore VE - VF Sedan July 2006 - Oct 2017 Gen IV 6.0 - LS3 6.2 1 3/4" 4 into 1 Headers 3" System (PP5381-61) at $4891.13 RRP
View partPH5315_L_R
PH 5315 Chevrolet 283-400 Small Block V8 To Suit Holden HQ-WB 1 5/8" 4 into 1
PH 5315 Chevrolet 283-400 Small Block V8 To Suit Holden HQ-WB 1 5/8" 4 into 1 (SKU: PH5315_L_R), $1159.44 from Pacemaker.
BrandPacemaker
Category: Extractors and headers
RRP $1159.44 AUD
Confirmed on orderAfterpay, Zip Pay & Zip Money available
Part specs
- SKU
- PH5315_L_R
- Supplier
- Pacemaker
- Category
- Extractors and headers
- Vehicle fitment
- Holden HJ HQ HX
- Stock status
- Confirmed on order
The Pacemaker PH5315 (MPN PH5315_L_R) is a 1-5/8 inch 4-into-1 extractor set for the Chevrolet 283-400 small-block V8, listed to suit a Holden HQ-WB swap. It's an L/R header pair for an engine conversion.
What is this extractor set?
These are 4-into-1 extractors with 1-5/8 inch primaries, cut for the Chevrolet 283-400 small-block V8 and listed to suit that engine in a Holden HQ through WB. 4-into-1 means all four primaries on a bank merge into a single collector — a different layout to the Tri-Y in the same family, generally favoured for top-end work. As an L/R pair it covers both banks. No flow or power numbers are published by the supplier.
What's the difference between 4-into-1 and Tri-Y?
On a 4-into-1 set the four primaries of each bank run straight into one collector; on a Tri-Y they pair off first. The two layouts bias the engine's character differently, which is why Pacemaker lists both for this conversion. Neither is 'better' in the abstract — it depends on the build and how the car is driven. For a small-block in a Holden body, clearance and the rest of the system matter just as much as the merge pattern.
Will it suit my Holden HQ-WB build?
It's listed to suit the Chevrolet 283-400 small-block fitted to a Holden HQ-WB. Conversion fitment depends on your mounts, sump and steering, so confirm your exact setup with the workshop before ordering.
What does fitting involve at our Illawarra workshop?
Oak Flats Muffler Men fits conversion extractors like these in the Illawarra. We check primary and collector clearance against your mounts and steering, fit fresh gaskets, and plan the system from the collectors back. RRP is listed at 1159 AUD; fitting is quoted once we've seen the conversion.
Stocked and fitted by Oak Flats Muffler Men, the Illawarra exhaust and 4x4 specialist in Oak Flats, NSW.
Common questions
- What's the collector layout on the PH5315?
- It's a 4-into-1 design — all four primaries per bank merge into one collector, with 1-5/8 inch tubing, for the Chev 283-400 small-block in a Holden HQ-WB.
- Should I choose this or the Tri-Y version?
- Both are listed for the same conversion; 4-into-1 and Tri-Y bias the engine differently. We'll talk through which suits your build at the workshop.
Fitment support across the Illawarra
Fitment checks near you across 18 Illawarra suburbs, from Oak Flats and Shellharbour to Wollongong and Kiama.Show nearby fitment areasCollapse section
Oak Flats Muffler Men can check this part against supplier specs, part number, image, RRP and vehicle details for customers around Oak Flats, Shellharbour, Wollongong, Dapto, Albion Park, Kiama and the northern suburbs.
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