Home / Shop / Mr. Gasket Header Bolts 918G Bolts, Hex Head, 8mm x 1.25 Thread Size, Steel, Black Oxide, 0.984 in. Underhead Length, Chevy, Small Block LS, Set of 12

Mr. Gasket Header Bolts 918G Bolts, Hex Head, 8mm x 1.25 Thread Size, Steel, Black Oxide, 0.984 in. Underhead Length, Chevy, Small Block LS, Set of 12

SKU: MRG918G

Header Fasteners

Mr. Gasket

Mr. Gasket Header Bolts 918G Bolts, Hex Head, 8mm x 1.25 Thread Size, Steel, Black Oxide, 0.984 in. Underhead Length, Chevy, Small Block LS, Set of 12

SKU: MRG918G

Header Fasteners

IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.

We accept

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

Header Bolt Set (12pk) GM LS1 8mm

Data: v4.2 - Upd: 2026-10-14 17:09:36

Specifications

Product Attributes - Brand: Mr. Gasket
Product Attributes - Manufacturer's Part Number: 918G
Product Attributes - Part Type: Header Fasteners
Product Attributes - Product Line: Mr. Gasket Header Bolts
Product Attributes - UPC: 084041039939
Product Attributes - Fastener Style: Bolt
Product Attributes - Thread Size: M8 x 1.25
Product Attributes - Head Style: Hex
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 - Quantity: Sold as a set of 12.

Reference Information

Brand Name/s	Mr. Gasket
StreetFX SKU	mrg918G
SFX Item ID	4982680
Supplier Item Code	4982680
Manufacturer SKU	918G
Manufacturer UPC	84041039939
Alternative References	8mm

Compatibility

Application Data

Universal No
Make GMC
Beginning Year 2011
Ending Year 2013
Engine Type V8
Engine Size 4.8L/294
Engine Family Chevy small block Gen I
Model SAVANA 3500
Submodel SS
Engine Version Vortec
Engine VIN Code A
Universal No
Make GMC
Beginning Year 2002
Ending Year 2009
Engine Type V8
Engine Size 6.0L/364
Engine Family GM Gas/Electric hybrid V8
Application Notes .
Model SAVANA 3500
Submodel SS
Engine Version N/R
Engine VIN Code U
Universal No
Make GMC
Beginning Year 2008
Ending Year 2009
Engine Type V8
Engine Size 5.3L/325
Engine Family Chevy small block Gen I
Model SAVANA 3500
Submodel LT
Engine Version Vortec
Engine VIN Code K
Universal No
Make GMC
Beginning Year 2010
Ending Year 2010
Engine Type V8
Engine Size 5.3L/325
Engine Family Chevy small block Gen I
Model SAVANA 3500
Submodel LTZ
Engine Version Vortec
Engine VIN Code G

Universal	No
Make	GMC
Beginning Year	2012
Ending Year	2013
Engine Type	V8
Engine Size	4.8L/294
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Model	SAVANA 3500
Submodel	LTZ
Engine Version	Vortec
Engine VIN Code	A

Universal	No
Make	GMC
Beginning Year	2006
Ending Year	2009
Engine Type	V8
Engine Size	6.0L/364
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Model	SAVANA 3500
Submodel	LTZ
Engine Version	Vortec
Engine VIN Code	U

Make GMC
Model SAVANA 3500
Submodel LS
Beginning Year 2011
Ending Year 2009
Engine Type V8
Engine Size 5.3L/325
Engine Family Chevy small block Gen III/IV (LS-based engines)
Engine Version Vortec
Engine VIN Code K
Make GMC
Model SAVANA 3500
Submodel LS
Beginning Year 2006
Ending Year 2010
Engine Type V8
Engine Size 5.3L/325
Engine Family Chevy small block Gen III/IV (LS-based engines)
Engine Version Vortec
Engine VIN Code G
Make GMC
Model SAVANA 3500
Submodel WT
Beginning Year 2012
Ending Year 2013
Engine Type V8
Engine Size 4.8L/294
Engine Family Chevy small block Gen I
Engine Version Vortec
Engine VIN Code A
Make GMC
Model SAVANA 3500
Submodel SLE
Beginning Year 1997
Ending Year 2000
Engine Type V8
Engine Size 5.3L/325
Engine Family Chevy small block Gen I
Engine Version Vortec
Engine VIN Code R
Make GMC
Model SAVANA 3500
Submodel SLT
Beginning Year 2011
Ending Year 2005
Engine Type V8
Engine Size 4.8L/294
Engine Family Chevy small block Gen I
Engine Version Vortec
Engine VIN Code R
Make GMC
Model SIERRA 1500
Submodel SLE
Beginning Year 2002
Ending Year 2005
Engine Type V8
Engine Size 4.8L/294
Engine Family Chevy small block Gen I
Engine Version Vortec
Engine VIN Code V
Make GMC
Model SIERRA 1500
Submodel SLE
Beginning Year 2002
Ending Year 2005
Engine Type V8
Engine Size 5.7L/350
Engine Family Chevy small block Gen III/IV (LS-based engines)
Engine Version Vortec
Engine VIN Code Z
Make GMC
Model SIERRA 1500
Submodel SLE
Beginning Year 2002
Ending Year 2005
Engine Type V8
Engine Size 5.0L/305
Engine Family Chevy small block Gen III/IV (LS-based engines)
Engine Version Vortec
Engine VIN Code T
Make GMC
Model SIERRA 1500
Submodel SLE
Beginning Year 1997
Ending Year 2004
Engine Type V8
Engine Size 5.7L/350
Engine Family Chevy small block Gen I
Engine Version Vortec
Engine VIN Code N
Make GMC
Model SIERRA 1500
Submodel SLE
Beginning Year 2005
Ending Year 2005
Engine Type V8
Engine Size 6.0L/364
Engine Family Chevy small block Gen III/IV (LS-based engines)
Engine Version Vortec
Engine VIN Code B
Make GMC
Model SIERRA 1500
Submodel C3
Beginning Year 2002
Ending Year 2001
Engine Type V8
Engine Size 5.0L/305
Engine Family Chevy small block Gen I
Engine Version Vortec
Engine VIN Code M
Make GMC
Model SIERRA 1500 CLASSIC
Submodel DENALI
Beginning Year 2007
Ending Year 2007
Engine Type V8
Engine Size 5.7L/350
Engine Family GM Gas/Electric hybrid V8
Engine Version Vortec
Engine VIN Code N
Make GMC
Model SIERRA 1500 CLASSIC
Submodel WT
Beginning Year 2005
Ending Year 2007
Engine Type V8
Engine Size 5.0L/305
Engine Family GM Gas/Electric hybrid V8
Engine Version Vortec
Engine VIN Code T
Make GMC
Model SIERRA 1500 CLASSIC
Submodel SL
Beginning Year 2006
Ending Year 2002
Engine Type V8
Engine Size 5.7L/350
Engine Family Chevy small block Gen I
Engine Version Vortec
Engine VIN Code R
Make GMC
Model SIERRA 1500 CLASSIC
Submodel SL
Beginning Year 2003
Ending Year 2005
Engine Type V8
Engine Size 6.0L/364
Engine Family Chevy small block Gen III/IV (LS-based engines)
Engine Version N/R
Engine VIN Code B
Make GMC
Model SIERRA 1500 CLASSIC
Submodel SL
Beginning Year 2003
Ending Year 2009
Engine Type V8
Engine Size 4.8L/294
Engine Family Chevy small block Gen III/IV (LS-based engines)
Engine Version N/R
Engine VIN Code V

Make	GMC
Model	SIERRA 1500 CLASSIC
Submodel	SL
Beginning Year	2003
Ending Year	2006
Engine Type	V8
Engine Size	5.3L/325
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Engine Version	Vortec
Engine VIN Code	T

Make	GMC
Model	SIERRA 1500 CLASSIC
Submodel	SLE
Beginning Year	2007
Ending Year	2007
Engine Type	V8
Engine Size	4.8L/294
Engine Family	Chevy small block Gen III/IV (LS-based engines)
Engine Version	Vortec
Engine VIN Code	V

Make GMC
Model SIERRA 1500 CLASSIC
Submodel SLE
Beginning Year 2010
Ending Year 1999
Engine Type V8
Engine Size 5.7L/350
Engine Family Chevy small block Gen I
Engine Version Vortec
Engine VIN Code B

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Mr. Gasket Header Bolts 918G Bolts, Hex Head, 8mm x 1.25 Thread Size, Steel, Black Oxide, 0.984 in. Underhead Length, Chevy, Small Block LS, Set of 12

Mr. Gasket Header Bolts 918G Bolts, Hex Head, 8mm x 1.25 Thread Size, Steel, Black Oxide, 0.984 in. Underhead Length, Chevy, Small Block LS, Set of 12

Description

Part Type

Specifications

Reference Information

Compatibility

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