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Mr. Gasket

Mr. Gasket Header Bolts 978G Fasteners, Bolts, Allen Head, Black Oxide, Steel, 8mm x 1.25 Thread, 25mm Length, Set of 16

SKU: MRG978G

Header Fasteners
Mr. Gasket Header Bolts 978G Fasteners, Bolts, Allen Head, Black Oxide, Steel, 8mm x 1.25 Thread, 25mm Length, Set of 16

Mr. Gasket

Mr. Gasket Header Bolts 978G Fasteners, Bolts, Allen Head, Black Oxide, Steel, 8mm x 1.25 Thread, 25mm Length, Set of 16

SKU: MRG978G

Header Fasteners
A$100.56
LOW STOCK! Est Ship 4-7 days. HURRY! LOW STOCK. This item is in limited stock at one of our distribution centres. The ETA is the approximate time required to prepare your order for dispatch.
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Description

Installing headers can sometimes be a real pain, due to the tight spaces and the location and shape of the tubes. Mr. Gasket can help make installation a little easier and also help prevent annoying exhaust leaks from under-tightened header bolts. They have both the socket-head and hex-head styles of header bolts available. Hex types are heat-treated Grade 5 steel and have smaller-than-standard heads to ease access in tight spaces. Socket-head bolts are made from stronger Grade 8 steel for added ruggedness and they're great for those really difficult-to-reach spots. Both styles have a protective black oxide finish.

Part Type

Metric Exhaust Header & Manifold Bolts

Data: v4.2 - Upd: 2026-10-14 09:41:11

Specifications

Product Attributes - Brand
Mr. Gasket
Product Attributes - Manufacturer's Part Number
978G
Product Attributes - Part Type
Header Fasteners
Product Attributes - Product Line
Mr. Gasket Header Bolts
Product Attributes - UPC
084041109786
Product Attributes - Fastener Style
Bolt
Product Attributes - Thread Size
M8 x 1.25
Product Attributes - Head Style
Internal allen
Product Attributes - Underhead Length (in.)
0.984 in.
Product Attributes - Underhead Length (mm)
25.00mm
Product Attributes - Fastener Material
Steel
Product Attributes - Fastener Color
Black
Product Attributes - Wrench Diameter
6mm
Product Attributes - Fastener Tensile Strength (psi)
170,000 psi
Product Attributes - Quantity
Sold as a set of 16.

Reference Information

Brand Name/s Mr. Gasket
StreetFX SKU mrg978G
SFX Item ID 4982072
Supplier Item Code 4982072
Manufacturer SKU 978G
Manufacturer UPC 84041109786
Alternative References 8mm, 25mm

Compatibility

Application Data
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1997
    Ending Year2004
    Engine TypeV8
    Engine Size5.7L/350
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2014
    Engine TypeV8
    Engine Size5.3L/325
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2015
    Engine TypeV8
    Engine Size4.8L/294
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
  • UniversalNo
    MakeCHEVROLET
    Beginning Year1999
    Ending Year2015
    Engine TypeV8
    Engine Size6.0L/364
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
  • UniversalNo
    MakeCHEVROLET
    Beginning Year2006
    Ending Year2015
    Engine TypeV8
    Engine Size7.0L/427
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
  • UniversalNo
    MakeCHEVROLET
    Beginning Year2008
    Ending Year2015
    Engine TypeV8
    Engine Size6.2L/376
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
  • UniversalNo
    MakeCHRYSLER
    Beginning Year2005
    Ending Year2010
    Engine TypeV8
    Engine Size6.1L/370
    Engine FamilyMopar Hemi Gen III
  • UniversalNo
    MakeCHRYSLER
    Beginning Year2005
    Ending Year2021
    Engine TypeV8
    Engine Size5.7L/345
    Engine FamilyMopar Hemi Gen III
  • UniversalNo
    MakeCHRYSLER
    Beginning Year2012
    Ending Year2014
    Engine TypeV8
    Engine Size6.4L/392
    Engine FamilyMopar Hemi Gen III
  • UniversalNo
    MakeDODGE
    Beginning Year2003
    Ending Year2021
    Engine TypeV8
    Engine Size5.7L/345
    Engine FamilyMopar Hemi Gen III
  • UniversalNo
    MakeDODGE
    Beginning Year2006
    Ending Year2010
    Engine TypeV8
    Engine Size6.1L/370
    Engine FamilyMopar Hemi Gen III
  • UniversalNo
    MakeDODGE
    Beginning Year2011
    Ending Year2021
    Engine TypeV8
    Engine Size6.4L/392
    Engine FamilyMopar Hemi Gen III
  • UniversalNo
    MakeFORD
    Beginning Year1992
    Ending Year2014
    Engine TypeV8
    Engine Size4.6L/281
    Engine FamilyFord modular V8
  • UniversalNo
    MakeFORD
    Beginning Year1997
    Ending Year2016
    Engine TypeV8
    Engine Size5.4L/330
    Engine FamilyFord modular V8
  • UniversalNo
    MakeJEEP
    Beginning Year2005
    Ending Year2021
    Engine TypeV8
    Engine Size5.7L/345
    Engine FamilyMopar Hemi Gen III
  • UniversalNo
    MakeJEEP
    Beginning Year2006
    Ending Year2010
    Engine TypeV8
    Engine Size6.1L/370
    Engine FamilyMopar Hemi Gen III
  • UniversalNo
    MakeJEEP
    Beginning Year2012
    Ending Year2021
    Engine TypeV8
    Engine Size6.4L/392
    Engine FamilyMopar Hemi Gen III
  • UniversalNo
    MakeRAM
    Beginning Year2011
    Ending Year2021
    Engine TypeV8
    Engine Size5.7L/345
    Engine FamilyMopar Hemi Gen III
  • UniversalNo
    MakeRAM
    Beginning Year2014
    Ending Year2021
    Engine TypeV8
    Engine Size6.4L/392
    Engine FamilyMopar Hemi Gen III

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