
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
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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.
Category: Extractors and headers


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.
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.
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.
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.
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.
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.
Send the vehicle make, model, year, engine, current issue, desired sound or performance goal, and clear photos of the existing exhaust where available.