PROFORM 66754 Wedge-Locking Header Bolts; Hex Head; M8 X .984in; Chevy LS; Nickel Plt; 12 Pcs
PROFORM 66754 Wedge-Locking Header Bolts; Hex Head; M8 X .984in; Chevy LS; Nickel Plt; 12 Pcs

PROFORM 66754 Wedge-Locking Header Bolts; Hex Head; M8 X .984in; Chevy LS; Nickel Plt; 12 Pcs

PROFORM
PRF66754
4 In Stock
$49.52
$45.32
$49.52

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PROFORM 66754 Wedge-Locking Header Bolts; Hex Head; M8 X .984in; Chevy LS; Nickel Plt; 12 Pcs

PROFORM

PROFORM 66754 Wedge-Locking Header Bolts; Hex Head; M8 X .984in; Chevy LS; Nickel Plt; 12 Pcs

$45.32 $49.52
PROFORM 66754 Wedge-Locking Header Bolts; Hex Head; M8 X .984in; Chevy LS; Nickel Plt; 12 Pcs
PROFORM 66754 Wedge-Locking Header Bolts; Hex Head; M8 X .984in; Chevy LS; Nickel Plt; 12 Pcs

PROFORM

PROFORM 66754 Wedge-Locking Header Bolts; Hex Head; M8 X .984in; Chevy LS; Nickel Plt; 12 Pcs

$45.32 $49.52
Description
Engine Header Bolts; Wedge-Locking Technology; Hex Head Type; M8 Thread X .984 Inch Long; Shiny Nickel Plated; 12.9 Steel; 12 Pcs in kit; Fits GM LS Engines with 1/4in Wide Flange
Each PROFORM 12.9 Steel (equiv. Grade 8+) Header Bolt is permanently assembled with a pair of special washers. When the bolt is torqued to 28+ ft-lbs, the washers super-hardened external teeth bite into and grip the bottom of the bolt head and the top surface of the header. After being self-locked in this manner, any bolt-loosening rotation is blocked by a wedge-locking action created by the washers interfacing, matching cams. It's an uphill climb: vibration that might ordinarily loosen the bolt actually increases the wedge-locking tension, securing the bolt even more. Because this simple wedge-locking method uses tension instead of friction, contact with oil actually facilitates the wedge effect. When changing headers, PROFORM Header Bolts can be untightened with a normal wrench, lubricated, and reused.

Application Summary:

Year Make/Model
2007-2013 Chevrolet Avalanche
2002-2006 Chevrolet Avalanche 1500
1997-1999 Chevrolet C1500
1997-1999 Chevrolet C1500 Suburban
1997-2000 Chevrolet C2500
1997-1999 Chevrolet C2500 Suburban
1997-2000 Chevrolet C35
1997-2000 Chevrolet C3500
1997-2002 Chevrolet Camaro
2010-2017 Chevrolet Camaro
2011-2017 Chevrolet Caprice
1997-2000 Chevrolet Cargo Van
2004 Chevrolet Cargo Van
2007-2017 Chevrolet Cheyenne
2009-2012 Chevrolet Colorado
1997-2017 Chevrolet Corvette
1997-2014 Chevrolet Express 1500
1997-2019 Chevrolet Express 2500
1997-2019 Chevrolet Express 3500
2009-2019 Chevrolet Express Cargo
2009-2019 Chevrolet Express Pasajeros
2006-2009 Chevrolet Impala
1997-1999 Chevrolet K1500
1997-1999 Chevrolet K1500 Suburban
1997-2000 Chevrolet K2500
1997-1999 Chevrolet K2500 Suburban
1997-2000 Chevrolet K3500
1999-2000 Chevrolet L30
2016-2018 Chevrolet LCF 3500
2006-2007 Chevrolet Monte Carlo
1997-2000 Chevrolet P30
2002-2004 Chevrolet P30
1997-1999 Chevrolet Silverado
1999-2017 Chevrolet Silverado 1500
2007 Chevrolet Silverado 1500 Classic
2001-2003 Chevrolet Silverado 1500 HD
2005-2006 Chevrolet Silverado 1500 HD
2007 Chevrolet Silverado 1500 HD Classic
1999-2014 Chevrolet Silverado 2500
2001-2019 Chevrolet Silverado 2500 HD
2007 Chevrolet Silverado 2500 HD Classic
2001-2006 Chevrolet Silverado 3500
2008-2013 Chevrolet Silverado 3500
2015-2018 Chevrolet Silverado 3500
2007 Chevrolet Silverado 3500 Classic
2007-2019 Chevrolet Silverado 3500 HD
2000-2006 Chevrolet Sonora
2014-2017 Chevrolet SS
2003-2006 Chevrolet SSR
2014 Chevrolet Suburban
2016-2019 Chevrolet Suburban
1997-2014 Chevrolet Suburban 1500
2000-2013 Chevrolet Suburban 2500
2016-2019 Chevrolet Suburban 3500 HD
1997-2014 Chevrolet Tahoe
2006-2009 Chevrolet Trailblazer
2003-2006 Chevrolet Trailblazer EXT
Fitment
Year
Make
Model
Engine
Notes
2007 - 2013
Chevrolet
Avalanche
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2002 - 2006
Chevrolet
Avalanche 1500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
C1500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
C1500
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1997 - 1999
Chevrolet
C1500 Suburban
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
C1500 Suburban
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1997 - 2000
Chevrolet
C2500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
C2500
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1997 - 1999
Chevrolet
C2500 Suburban
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
C2500 Suburban
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1997 - 2000
Chevrolet
C35
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
C35
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1997 - 2000
Chevrolet
C3500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
C3500
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1997 - 2002, 2010 - 2017
Chevrolet
Camaro
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
Camaro
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
2011 - 2017
Chevrolet
Caprice
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 2000, 2004
Chevrolet
Cargo Van
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
Cargo Van
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
2007 - 2017
Chevrolet
Cheyenne
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2009 - 2012
Chevrolet
Colorado
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 2017
Chevrolet
Corvette
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
Corvette
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1997 - 2014
Chevrolet
Express 1500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
Express 1500
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1997 - 2019
Chevrolet
Express 2500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
Express 2500
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1997 - 2019
Chevrolet
Express 3500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
Express 3500
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
2009 - 2019
Chevrolet
Express 4500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2009 - 2019
Chevrolet
Express Cargo
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2009 - 2019
Chevrolet
Express Pasajeros
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2006 - 2009
Chevrolet
Impala
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
K1500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
K1500
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1997 - 1999
Chevrolet
K1500 Suburban
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
K1500 Suburban
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1997 - 2000
Chevrolet
K2500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
K2500
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1997 - 1999
Chevrolet
K2500 Suburban
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
K2500 Suburban
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1997 - 2000
Chevrolet
K3500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
K3500
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1999 - 2000
Chevrolet
L30
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1999
Chevrolet
L30
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
2016 - 2018
Chevrolet
LCF 3500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2016 - 2019
Chevrolet
LCF 4500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2006 - 2007
Chevrolet
Monte Carlo
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 2000, 2002 - 2004
Chevrolet
P30
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
P30
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1997 - 1999
Chevrolet
Silverado
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
Silverado
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1999 - 2017
Chevrolet
Silverado 1500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1999
Chevrolet
Silverado 1500
4.8L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1999
Chevrolet
Silverado 1500
5.3L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
2007
Chevrolet
Silverado 1500 Classic
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2001 - 2003, 2005 - 2006
Chevrolet
Silverado 1500 HD
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2007
Chevrolet
Silverado 1500 HD Classic
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1999 - 2014
Chevrolet
Silverado 2500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1999
Chevrolet
Silverado 2500
5.3L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1999
Chevrolet
Silverado 2500
6.0L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
2001 - 2019
Chevrolet
Silverado 2500 HD
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2007
Chevrolet
Silverado 2500 HD Classic
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2001 - 2006, 2008 - 2013, 2015 - 2018
Chevrolet
Silverado 3500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2007
Chevrolet
Silverado 3500 Classic
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2007 - 2019
Chevrolet
Silverado 3500 HD
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2000 - 2006
Chevrolet
Sonora
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2014 - 2017
Chevrolet
SS
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2003 - 2006
Chevrolet
SSR
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2014, 2016 - 2019
Chevrolet
Suburban
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 2014
Chevrolet
Suburban 1500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
Suburban 1500
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
2000 - 2013
Chevrolet
Suburban 2500
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2016 - 2019
Chevrolet
Suburban 3500 HD
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 2014
Chevrolet
Tahoe
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
Tahoe
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
2006 - 2009
Chevrolet
Trailblazer
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
2003 - 2006
Chevrolet
Trailblazer EXT
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 2009
Chevrolet
W3500 Tiltmaster
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
W3500 Tiltmaster
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
1997 - 2010
Chevrolet
W4500 Tiltmaster
Hex Head; M8 X .984in; Chevy LS; Nickel Plt
1997 - 1999
Chevrolet
W4500 Tiltmaster
5.7L
Hex Head
Chevy LS
Nickel Plt
M8 X .984in
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