Holden Commodore VE VF V8 Ute & WM/WN Caprice Dual 3in Full System 1
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View partBOL04-B50
(Pack 50) M8 x 1.25p 3/8in Head x 25mm, LS Engine Commodore, 5.7L HEMI
(Pack 50) M8 x 1.25p 3/8in Head x 25mm, LS Engine Commodore, 5.7L HEMI (SKU: BOL04-B50) Engineered for a wide range.
BrandMantaMPI Automotive
Category: Extractors and headers
RRP $79.96 AUD
In stock at supplierAfterpay, Zip Pay & Zip Money available
Part specs
- SKU
- BOL04-B50
- Supplier
- MPI Automotive
- Category
- Extractors and headers
- Stock status
- In stock at supplier
The MPI Automotive BOL04-B50 is a pack of 50 header bolts, 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 a bulk fastener pack rather than an exhaust part, sized for a workshop fitting several sets of extractors or headers.
What is this bolt pack and where does it go?
The BOL04-B50 is hardware: 50 header bolts that fasten the extractor or header flange to the cylinder head. Each bolt is M8 with a 1.25mm thread pitch, has a 3/8in head for the socket, and is 25mm long. Header bolts sit in a hot, vibration-heavy location and are replaced rather than reused, so a 50-pack suits a busy bay or someone fitting more than one engine. The bolts carry no flow or sound function of their own; they simply secure the exhaust hardware.
What do the M8 x 1.25 and 25mm figures mean?
M8 x 1.25 is the thread spec: an 8mm shank with 1.25mm spacing between threads, which is what these LS and 5.7L applications call for. The 3/8in head defines the tool, and the 25mm length is the run of the bolt through the flange into the head. All three need to match the head and header you are fitting, because the wrong length or pitch will not seat the flange properly against the gasket.
Will it suit my Commodore?
The BOL04-B50 is listed to suit LS-engine and 5.7L Hemi-style setups in the Commodore. Fastener fit depends on your specific head, flange and header, so confirm the build with the workshop before ordering rather than relying on the model name.
What does fitting involve at our Illawarra workshop?
Oak Flats Muffler Men fits extractors and headers in-house across the Illawarra, and fresh hardware like the BOL04-B50 is part of that. We torque header bolts evenly so the flange and gasket seat without leaks. Supplied by MPI Automotive at $79.96 AUD; tell us your engine and header and we will confirm the bolt size before booking the work.
Stocked and fitted by Oak Flats Muffler Men, the Illawarra exhaust and 4x4 specialist in Oak Flats, NSW.
Common questions
- How many bolts are in the BOL04-B50?
- Fifty. Each is M8 with a 1.25mm thread pitch, a 3/8in head and a 25mm length.
- Why buy a 50-pack of header bolts?
- Header bolts are replaced rather than reused, so a bulk pack suits a workshop or anyone fitting more than one set of extractors or headers.
- Will these suit an LS or Hemi Commodore?
- They are listed for LS-engine and 5.7L Hemi-style fitments in the Commodore. Confirm your exact head and header with the workshop first.
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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