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.
View partBOL04
M8 x 1.25p 3/8in Head x 25mm, LS Engine Commodore, 5.7L HEMI
M8 x 1.25p 3/8in Head x 25mm, LS Engine Commodore, 5.7L HEMI for selected vehicle applications.
BrandMantaMPI Automotive
Category: Extractors and headers
RRP $2.21 AUD
In stock at supplierAfterpay, Zip Pay & Zip Money available
Part specs
- SKU
- BOL04
- Supplier
- MPI Automotive
- Category
- Extractors and headers
- Stock status
- In stock at supplier
The MPI Automotive BOL04 is a single header bolt, M8 x 1.25 pitch with a 3/8in head and a 25mm length, listed for LS-engine and 5.7L Hemi-style fitments in the Holden Commodore. It is sold individually as exhaust hardware, the bolt that fastens an extractor or header flange to the cylinder head.
What is this bolt and where does it go?
The BOL04 is a single header bolt for the flange where the tubular runners meet the cylinder head. It is M8 with a 1.25mm thread pitch, has a 3/8in head for the socket, and runs 25mm long. Buying singly suits topping up a set or replacing one that has stretched or seized, since header bolts work in a hot, vibration-prone spot and are not meant to be reused indefinitely. The bolt has no effect on flow or sound on its own; it simply holds the exhaust hardware to the engine.
What do the M8 x 1.25 and 25mm figures mean?
M8 x 1.25 describes the thread: an 8mm shank with 1.25mm between thread crests, the size these LS and 5.7L applications use. The 3/8in head is the tool size, and the 25mm length is how far the bolt runs through the flange into the head. Each figure has to match your head and header, because a bolt that is too long or the wrong pitch will bottom out or fail to seat the flange against the gasket.
Will it suit my Commodore?
The BOL04 is listed to suit LS-engine and 5.7L Hemi-style setups in the Commodore. Bolt fit comes down to the exact head, flange and header you are running, so confirm your build with the workshop before ordering rather than going by the model name alone.
What does fitting involve at our Illawarra workshop?
Oak Flats Muffler Men fits extractors and headers in-house across the Illawarra, and the right bolt like the BOL04 is part of doing the job cleanly. We torque header bolts evenly so the flange and gasket seat without leaks. Supplied by MPI Automotive at $2.21 AUD; tell us your engine and header and we will confirm the bolt is correct before booking the bay.
Stocked and fitted by Oak Flats Muffler Men, the Illawarra exhaust and 4x4 specialist in Oak Flats, NSW.
Common questions
- Is the BOL04 sold as a single bolt?
- Yes. It is one header bolt, M8 with a 1.25mm thread pitch, a 3/8in head and a 25mm length.
- What is this bolt used for?
- It fastens an extractor or header flange to the cylinder head on LS and 5.7L Hemi-style engines. It is hardware, not an exhaust component in itself.
- Will it suit my Commodore?
- It is listed for LS-engine and 5.7L Hemi-style fitments in the Commodore. Confirm your exact head and header with the workshop before ordering.
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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