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View partMHF5225
Holden 253-308 V8 1 3/4in Header Flange Non EFI Head
Holden 253-308 V8 1 3/4in Header Flange Non EFI Head (MHF5225) fits selected vehicle applications.
BrandMantaMPI Automotive
Category: Extractors and headers
RRP $71.08 AUD
In stock at supplierAfterpay, Zip Pay & Zip Money available
Part specs
- SKU
- MHF5225
- Supplier
- MPI Automotive
- Category
- Extractors and headers
- Stock status
- In stock at supplier
The MPI Automotive MHF5225 is a 1¾in header flange listed to fit the Holden 253 and 308 V8 with the non-EFI head — the machined plate that mates a header or extractor set to the cylinder head, sold on its own as a fabrication and repair component.
What is a header flange and where does it sit?
A header flange is the thick, ported plate that bolts to the cylinder head and that the primary tubes of a header weld into. It sets the port pattern and the tube bore — here drilled for 1¾in primaries — and carries the bolt holes that locate everything to the head. It's a building block for fabricating or repairing extractors, not a complete exhaust part in itself.
Why the non-EFI head matters here
MPI lists this flange specifically for the non-EFI head on the Holden 253 and 308 V8. Port shape and bolt spacing differ between head castings, so the flange has to match the head you actually have — this one is cut for the carburettor-era non-EFI pattern, not the later EFI head. Getting that right is the whole point of buying a flange to a specific head.
Will it suit my Holden V8 build?
It's listed to suit the Holden 253 and 308 with the non-EFI head and 1¾in tube, with no other detail published, so we treat fitment as listed-to-suit and confirm against your head casting before it's used. As a raw component it's matched on port pattern and tube size rather than a bolt-on vehicle fit.
Stocked and fitted by Oak Flats Muffler Men, the Illawarra exhaust and 4x4 specialist in Oak Flats, NSW.
Common questions
- What tube size is the MHF5225 drilled for?
- 1¾in primaries — that's the bore the flange is cut to accept where the header tubes weld in.
- Will it suit an EFI Holden V8 head?
- No — MPI lists this flange for the non-EFI head only. Confirm your head casting with the workshop before ordering.
- Is this a complete extractor set?
- No — it's the header flange alone, a fabrication component. Oak Flats Muffler Men, in the Illawarra, can advise on the rest of the build.
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.
Check fitment near Oak FlatsCheck fitment near Albion Park RailCheck fitment near ShellharbourCheck fitment near WollongongCheck fitment near DaptoCheck fitment near WarillaCheck fitment near CorrimalCheck fitment near WoononaCheck fitment near BulliCheck fitment near ThirroulCheck fitment near KiamaCheck fitment near Albion ParkCheck fitment near Lake IllawarraCheck fitment near Mount WarrigalCheck fitment near Barrack HeightsCheck fitment near Barrack PointCheck fitment near BlackbuttCheck fitment near Flinders
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Send the vehicle make, model, year, engine, current issue, desired sound or performance goal, and clear photos of the existing exhaust where available.