HOLDEN COMMODORE VT VU VX VY VZ 5.7L, 6.0L V8 1 3/4" LS1 LS2 GEN3/4 MANDREL BENT - TUNED DESIGN ## USE DSF138 X 2 GASKET ## for Extractors - Holden.
Category: Extractors and headers
This Exhaust Systems Australia 1-3/4in tuned-design header set (use DSF138 x 2 gasket) is listed to fit the Holden Commodore VT, VU, VX, VY and VZ with the 5.7L and 6.0L LS1, LS2 Gen3/4 V8. It is a mandrel-bent extractor set sized at 4in, the engine-end upgrade that replaces the factory exhaust manifolds.
Headers, also called extractors, replace the cast manifolds that bolt to the cylinder heads. Instead of dumping the exhaust into a shared casting, each cylinder gets its own tubular runner so the pulses are separated before they merge. The trade-off is that tubular headers sit in the hottest part of the engine bay and need a clean flange seal, which is why this set is listed to run with the DSF138 gasket, two of them, one per bank on the V8. They change where the exhaust starts, not the rest of the system behind them.
The 1-3/4in figure is the primary tube size, and tuned means the runner lengths are matched rather than cut to the shortest path. Mandrel bending keeps the tube's internal diameter consistent through each bend rather than crimping it, which is why this kit is described at 4in across the collector area. Every figure here traces to the listing; no power or sound numbers are published by the supplier.
It is listed to fit the VT through VZ Commodore with the 5.7L or 6.0L LS1/LS2 Gen3/4 V8. That covers a long run of Holden's LS-powered cars, but the exact head, accessories and steering setup decide clearance, so confirm your build with the workshop before ordering rather than going by the badge alone.
Oak Flats Muffler Men fits header sets like this in-house across the Illawarra. We check flange seating against the listed DSF138 gaskets, work around steering and crossmember clearances, and torque the runners evenly so the joints seal. Supplied by Exhaust Systems Australia at $1,355 AUD; send your VT-VZ build and we will confirm the kit suits it before booking the bay.
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.
More extractors and headers the workshop supplies and fits. Send the vehicle and the part you are weighing up for a fitted quote.
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Exhaust Systems Australia Holden Commodore VE-VF V8 1 7/8" Tuned (SS, Calais, GTS) ## Mandrel Bent ## USE DSF138 X 2 ##.
View partHOLDEN COMMODORE VT-VZ 5.7L GENIII TUNED 1 3/4" HEADER - CAT X 2 X 2 1/2".
View partSend the vehicle make, model, year, engine, current issue, desired sound or performance goal, and clear photos of the existing exhaust where available.
