
Holden Commodore VE VF V8 Ute & WM/WN Caprice Dual 3in Full System 1
MPI AutomotiveRRP$6639.02MPI Automotive Holden Commodore VE VF V8 Ute & WM/WN Caprice Dual 3in Full System 1 7/8in HPC Extractors 3.5in Tips.
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Holden HQ HJ HX HZ With LS 5.7-6.0L 1 7/8in Primaries 4 into 1 Tuned 3in Outlets Extractor (SKU: FX-301) Engineered.
Category: Extractors and headers


The MPI Automotive FX-301 is a tuned-length extractor listed to fit Holden HQ, HJ, HX and HZ models running an LS 5.7L or 6.0L engine. It uses 1-7/8in primaries in a 4-into-1 design with 3in outlets.
This is the header for an LS-swapped classic Holden — the FX-301 suits an HQ-HZ body with a 5.7L or 6.0L LS V8 fitted. It runs 1-7/8in primary tubes in a tuned 4-into-1 layout finishing in 3in outlets. The larger 1-7/8in primary is sized for the airflow of a modern LS rather than a stock engine, which is why this is a conversion part rather than a factory replacement.
A tuned-length (or equal-length) extractor sets each primary pipe to a deliberate length so the cylinders' exhaust pulses arrive at the collector in a chosen rhythm, rather than whatever the cast manifold happened to give. Merging 4-into-1 keeps all four runners on each bank feeding one collector. On an LS conversion into an HQ-HZ chassis, the extractor also bridges the gap between the modern engine's port layout and the older car's tunnel and steering — so geometry, not just tube size, is the work.
It's listed to fit the Holden HQ, HJ, HX and HZ bodies with an LS 5.7L or 6.0L. Because LS swaps vary in mounts, sump and steering, the exact build decides whether the 1-7/8in primaries clear everything — send us your conversion details and we'll confirm the FX-301 fits before ordering. We treat the listing as 'listed to fit', not guaranteed.
Oak Flats Muffler Men supplies and fits LS-conversion extractors like the FX-301 across the Illawarra. We get the car up, check the primaries clear the steering and crossmember on your particular swap, and pipe the 3in outlets into the rest of the system. The RRP is listed at $1494.15, and we confirm the build with you first.
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.