PH5320_L_R

PH 5320 Chevrolet 283-400 Small Block V8 To Suit Holden HQ-WB 1 3/4" Tri-Y

PH 5320 Chevrolet 283-400 Small Block V8 To Suit Holden HQ-WB 1 3/4" Tri-Y (SKU: PH5320_L_R), $1159.44 from Pacemaker.

BrandPacemaker

Category: Extractors and headers

RRP $1159.44 AUD
Confirmed on order
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PH 5320 Chevrolet 283-400 Small Block V8 To Suit Holden HQ-WB 1 3/4" Tri-Y product image

Part specs

SKU
PH5320_L_R
Supplier
Pacemaker
Category
Extractors and headers
Vehicle fitment
Holden HJ HQ HX
Stock status
Confirmed on order

The Pacemaker PH5320 (MPN PH5320_L_R) is a 1-3/4 inch Tri-Y 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 with larger primaries than the 1-5/8 inch option.

What is this extractor set?

These are Tri-Y extractors with 1-3/4 inch primaries, cut for the Chevrolet 283-400 small-block V8 and listed to suit that engine in a Holden HQ through WB. Tri-Y describes how the primaries pair off before merging. The 1-3/4 inch primary is the larger-tube option in this family, where the same conversion is also offered in 1-5/8 inch. As an L/R pair it covers both banks. No flow or power numbers are published.

Why does primary diameter matter?

Primary tube size shifts where an engine wants to make its effort — broadly, smaller primaries suit lower-rev street work and larger ones suit higher-rev, more built combinations. That's why Pacemaker lists this conversion in both 1-5/8 and 1-3/4 inch. It's a choice to match to your engine spec, not a universal upgrade. We don't publish numbers, so the right pick comes from the build rather than a headline figure.

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. The larger 1-3/4 inch primary suits more built engines, so confirm your engine spec, mounts and steering with the workshop before ordering.

What does fitting involve at our Illawarra workshop?

Oak Flats Muffler Men fits small-block conversion extractors like these in the Illawarra. We check primary 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

How is the PH5320 different from the 1-5/8 version?
It runs larger 1-3/4 inch Tri-Y primaries instead of 1-5/8 inch, for the same Chev 283-400 in a Holden HQ-WB. The larger tube suits more built engines — we'll help you choose at the workshop.
Is it a left and right pair?
Yes — PH5320_L_R is an L/R extractor pair covering both banks.

Fitment support across the Illawarra

Fitment checks near you across 18 Illawarra suburbs, from Oak Flats and Shellharbour to Wollongong and Kiama.
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