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Doug's Headers D3349 Long Tube Headers, 64-67 Chevelle LS Swap

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#447D3349

Doug's Headers D3349 Long Tube Headers, 64-67 Chevelle LS Swap

Mandrel bent 1-7/8" primary
3" collectors
Fits all GM LS engines and includes bungs for 02 sensors

Finish:

Ceramic Coated

$765.93

Factory Shipped

$851.03

Save $85.10

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Product Summary

3 Inch Collector Diameter, Hardware Included

Mandrel bent 1-7/8" primary
3" collectors
Fits all GM LS engines and includes bungs for 02 sensors
Designed for use with Doug's Headers LS swap mounts and exhaust system
3/8" flanges and V-band clamps for a leak proof seal

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Key Specs

MFG. Part #	D3349
Weld-Up	No
Collector Diameter	3 Inch
Hardware Included	Yes
Collector Reducers Included	No

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Need To Know

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855.313.9176

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Return Policy

Doug's Headers D3349 Details

Doug's Headers LS Engine Swap products work together to ensure a proper fit for the LS Engine into specific applications. We understand that engine swap projects often take place over time and careful consideration goes into choosing the right products to suit a range of budgets. That's why we're offering our LS engine swap products a la carte so you can buy product as your build requires with the flexibility to build your project your way.

Mandrel bent 1-7/8" primary
3" collectors
Fits all GM LS engines and includes bungs for 02 sensors
Designed for use with Doug's Headers LS swap mounts and exhaust system
3/8" flanges and V-band clamps for a leak proof seal
Silver Metallic Ceramic Coating for strong corrosion resistance and heat retention

Rebates

Aeromotive & PerTronix Black Friday 10% Off Sale

Black Friday Savings Are Here! From November 1 2026 through November 30 2026, save 10% on all Aeromotive and PerTronix products, including top performance brands like Doug's Headers, Taylor Cable, and JBA Performance Exhaust. Whether you're upgrading your fuel system, ignition components, headers, spark plug wires, or exhaust setup, this limited-time offer makes it easy to get premium performance parts at a great price. No coupon required, just shop qualifying Aeromotive and PerTronix brands and enjoy instant savings all month long.

Guides & Documents

Headers Installation Instructions (447D3349)

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

CA WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

CARB warning

Doug's Headers D3349 Specifications

KEY SPECS
MFG. Part #	D3349
Brand	Doug's Headers
Weld-Up	No
Collector Diameter	3 Inch
Hardware Included	Yes
Collector Reducers Included	No

GENERAL
Sold in Quantity	Pair
GTIN Code	694342555504
Tuned	No
Crossover Pipe Included	No
Gaskets Included	Yes
Transmission Mount Included	No
Catalytic Converter(s) Included	No
Motor Mounts Included	No

Ratings & Reviews

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Fitment

2004 Buick Rainier

GM LM4

2004-2005 Cadillac CTS

GM LS6

2006-2007 Cadillac CTS

GM LS2

2009-2014 Cadillac CTS

GM LSA

2002-2011 Cadillac Escalade

GM LM7
GM LQ9

2012 Cadillac Escalade

6.2 Chevy LS V8

2013 Cadillac Escalade

GM L9H

2014 Cadillac Escalade

GM L94

2003-2006 Cadillac Escalade ESV

GM LM7
GM LQ9

2007-2012 Cadillac Escalade ESV

6.2 Chevy LS V8

2013 Cadillac Escalade ESV

GM L9H

2014 Cadillac Escalade ESV

GM L94

2002-2006 Cadillac Escalade EXT

GM LM7
GM LQ9

2007-2012 Cadillac Escalade EXT

6.2 Chevy LS V8

2013 Cadillac Escalade EXT

GM L9H

2007-2011 Chevy Avalanche

GM L76
GM LC9
GM LMG
GM LY5

2012-2013 Chevy Avalanche

GM LY5

2002-2006 Chevy Avalanche 1500

GM LM7

2000-2002 Chevy C1500

4.8 Chevy LS V8
GM LM7
GM LQ4

1998-2002 Chevy Camaro

GM LS1

2010-2014 Chevy Camaro

GM LS3

1997-2000 Chevy Corvette

GM LS1

2001-2004 Chevy Corvette

GM LS1
GM LS6

2005-2007 Chevy Corvette

GM LS2

2008-2013 Chevy Corvette

GM LS3

2006-2009 Chevy Impala

GM LS4

2006-2007 Chevy Monte Carlo

GM LS4

1999 Chevy Silverado 1500

4.8 Chevy LS V8
GM LM7

2000-2011 Chevy Silverado 1500

4.8 Chevy LS V8
GM L20
GM LM7
GM LY2

2012-2014 Chevy Silverado 1500

4.8 Chevy LS V8
GM LM7

2007 Chevy Silverado 1500 Classic

GM LQ4

2001-2003 Chevy Silverado 1500 HD

GM LQ4

2005-2006 Chevy Silverado 1500 HD

GM LQ4

2007 Chevy Silverado 1500 HD

GM LQ9

2007 Chevy Silverado 1500 HD Classic

GM LQ4

2000-2004 Chevy Silverado 2500

GM LM7
GM LQ4

2005 Chevy Silverado 2500

GM LQ9

2001-2011 Chevy Silverado 2500 HD

GM LQ4

2007 Chevy Silverado 2500 HD Classic

GM LQ4

2001-2006 Chevy Silverado 3500

GM LQ4

2007 Chevy Silverado 3500 Classic

GM LQ4

2007-2011 Chevy Silverado 3500 HD

GM LQ4

2014-2017 Chevy SS

GM LS3

2003-2004 Chevy SSR

GM LM4

2005-2006 Chevy SSR

GM L77

2014 Chevy Suburban

GM LMG
GM LY5

2000-2001 Chevy Suburban 1500

GM LM7

2002-2006 Chevy Suburban 1500

GM L59
GM LM7

2007-2009 Chevy Suburban 1500

GM LC9
GM LMG
GM LY5

2010-2011 Chevy Suburban 1500

GM LC9
GM LMG

2012-2014 Chevy Suburban 1500

GM LMG
GM LY5

2000-2006 Chevy Suburban 2500

GM LQ4

2007-2011 Chevy Suburban 2500

GM L96

2012-2013 Chevy Suburban 2500

GM LMG
GM LY5

2000-2006 Chevy Tahoe

4.8 Chevy LS V8
GM L59
GM LM7

2007 Chevy Tahoe

4.8 Chevy LS V8
GM LMG
GM LY5

2008 Chevy Tahoe

6.2 Chevy LS V8
GM L9H
GM LC9
GM LMG

2009 Chevy Tahoe

GM L9H
GM LC9
GM LMG

2010-2011 Chevy Tahoe

GM LC9
GM LMG

2012-2014 Chevy Tahoe

GM LMG
GM LY5

2002-2005 Chevy Trailblazer

GM LH6

2006-2009 Chevy Trailblazer

GM LS2

2002-2009 GMC Envoy

GM LM4

2002-2006 GMC Envoy XL

GM LM4

2004-2005 GMC Envoy XUV

GM LM4

2001-2005 GMC Savana 1500

4.8 Chevy LS V8
GM LM7
GM LQ4

2006 GMC Savana 1500

4.8 Chevy LS V8
GM L33
GM L94
GM LM7
GM LQ4

2007-2014 GMC Savana 1500

4.8 Chevy LS V8
GM L33
GM L94
GM LQ4

2001-2005 GMC Savana 2500

4.8 Chevy LS V8
GM LM7
GM LQ4

2006-2013 GMC Savana 2500

4.8 Chevy LS V8
GM L33
GM L94
GM LQ4

2002-2005 GMC Savana 3500

4.8 Chevy LS V8
GM LM7
GM LQ4

2006-2013 GMC Savana 3500

4.8 Chevy LS V8
GM L33
GM L94
GM LQ4

1999-2011 GMC Sierra 1500

GM L20
GM L9H
GM LC9
GM LMG

2007 GMC Sierra 1500 Classic

GM L33
GM L59
GM LM7

2001-2003 GMC Sierra 1500 HD

GM LQ4

2005-2006 GMC Sierra 1500 HD

GM LQ4

2007 GMC Sierra 1500 HD Classic

GM LQ4

1999-2001 GMC Sierra 2500

GM LM7
GM LQ4

2002-2004 GMC Sierra 2500

GM LQ4

2001-2011 GMC Sierra 2500 HD

GM LQ4

2015-2019 GMC Sierra 2500 HD

GM L96

2007 GMC Sierra 2500 HD Classic

GM LQ4

2001-2006 GMC Sierra 3500

GM LQ4

2007 GMC Sierra 3500

GM L96

2007 GMC Sierra 3500 Classic

GM LQ4

2007-2011 GMC Sierra 3500 HD

GM L96

2015-2019 GMC Sierra 3500 HD

GM L96

2001 GMC Sierra C3

GM LQ4

2000-2007 GMC Yukon

4.8 Chevy LS V8
GM L20
GM LM7
GM LY2

2008-2011 GMC Yukon

4.8 Chevy LS V8
GM L20
GM L94
GM LM7
GM LY2

2012-2013 GMC Yukon

GM L94
GM LC9
GM LMG

2000 GMC Yukon XL 1500

GM LM7

2001-2011 GMC Yukon XL 1500

GM L59
GM LM7
GM LQ4

2012-2014 GMC Yukon XL 1500

GM L96

2000-2011 GMC Yukon XL 2500

GM LQ4

2012-2013 GMC Yukon XL 2500

GM L96

2003-2007 Hummer H2

GM LQ4

2008-2009 Hummer H2

6.2 Chevy LS V8

2008-2009 Hummer H3

GM LH8

2010 Hummer H3

GM LH9

2009 Hummer H3T

GM LH8

2010 Hummer H3T

GM LH9

1998-2002 Pontiac Firebird

GM LS1

2009 Pontiac G8

GM LS3

2004 Pontiac GTO

GM LS1

2005-2006 Pontiac GTO

GM LS2