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-B25
(Pack 25) M8 x 1.25p 3/8in Head x 25mm, LS Engine Commodore, 5.7L HEMI
(Pack 25) 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 $44.42 AUD
In stock at supplierAfterpay, Zip Pay & Zip Money available
Part specs
- SKU
- BOL04-B25
- Supplier
- MPI Automotive
- Category
- Extractors and headers
- Stock status
- In stock at supplier
The MPI Automotive BOL04-B25 is a pack of 25 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 fastener pack, not an exhaust component, sold to bolt extractors and headers onto those engines.
What is this bolt pack and where does it go?
The BOL04-B25 is hardware: 25 header bolts to suit the extractor or header flange where the tubular runners meet the cylinder head. Each bolt is M8 with a 1.25mm thread pitch, carries a 3/8in head for the spanner or socket, and runs 25mm long. Header bolts live in a hot, vibration-prone spot, so they are bought fresh rather than reused, and a pack of 25 covers a typical V8 install with spares. It does nothing to the sound or flow itself; 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, which is the size called for on these LS and 5.7L applications. The 3/8in head sets the tool you reach for, and the 25mm length is how far the bolt runs through the flange into the head. Matching all three to your particular head and flange matters, because a header bolt that is too long or the wrong pitch will not seat cleanly.
Will it suit my Commodore?
The BOL04-B25 is listed to suit LS-engine and 5.7L Hemi-style setups in the Commodore. Because bolt fitment comes down to the exact head, flange and header you are running, confirm your build with the workshop before ordering rather than going on 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 a fresh bolt pack like the BOL04-B25 is part of doing that job properly. We torque header bolts evenly to settle the flange and gasket. Supplied by MPI Automotive at $44.42 AUD; send us your engine and header details and we will confirm the bolts are right before booking the bay.
Stocked and fitted by Oak Flats Muffler Men, the Illawarra exhaust and 4x4 specialist in Oak Flats, NSW.
Common questions
- What size are the bolts in the BOL04-B25?
- Each is M8 with a 1.25mm thread pitch, a 3/8in head and a 25mm length. The pack holds 25 of them.
- Is this an exhaust part or just hardware?
- It is hardware. The BOL04-B25 is a header bolt pack used to fasten extractors or headers to LS and 5.7L Hemi-style engines; it is not an exhaust component on its own.
- Will these bolts suit my Commodore?
- They are listed for LS-engine and 5.7L Hemi-style fitments in the Commodore. Confirm your exact head, flange 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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Send the vehicle make, model, year, engine, current issue, desired sound or performance goal, and clear photos of the existing exhaust where available.