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Guaranteed to Fit2003 GMC Sierra 1500 Change Vehicle
Gibson® 2003 GMC Sierra 1500 - Shorty Headers
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$886.99
$1,008.24Save: $121.25(12%)
Manufacturer #GP129S
Guaranteed to Fit2003 GMC Sierra 1500 Change Vehicle
Qty:
1
Your Vehicle Fit Details
Vehicle Name
Submodel
Engine
Fitment Information
2003 GMC Sierra 1500
WT
8 Cyl 4.8L
CARB E.O. D-411-11
2003 GMC Sierra 1500
SLE
8 Cyl 5.3L
CARB E.O. D-411-11
2003 GMC Sierra 1500
Base
8 Cyl 4.8L
CARB E.O. D-411-11
2003 GMC Sierra 1500
SLT
8 Cyl 4.8L
CARB E.O. D-411-11
2003 GMC Sierra 1500
Base
8 Cyl 5.3L
CARB E.O. D-411-11
2003 GMC Sierra 1500
WT
8 Cyl 5.3L
CARB E.O. D-411-11
2003 GMC Sierra 1500
SL
8 Cyl 4.8L
CARB E.O. D-411-11
2003 GMC Sierra 1500
SLT
8 Cyl 5.3L
CARB E.O. D-411-11
2003 GMC Sierra 1500
SL
8 Cyl 5.3L
CARB E.O. D-411-11
2003 GMC Sierra 1500
SLE
8 Cyl 4.8L
CARB E.O. D-411-11
Highlights
Part:
Brand:
Emissions:
50-State Legal
Series:
Performance Series
Header Style:
Shorty
Primary Tube Diameter:
1 1/2 in. Primary Tube
Color Finish:
Natural
Collector Diameter:
Stock Collector
Quantity Sold:
Kit
Warranty:
Lifetime Gibson limited warranty
Prop 65 Warning:
WARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Collector Attachment Style:
OE Style Flange
Design:
4-1
EO Number:
EO Number: D-411-9; D-411-11
Head Flange Thickness:
3/8 in. Thick Head Flange
Includes:
With Premium gasket, installation hardware and Bolts/Studs
Material:
Made of Stainless Steel
Port Shape:
Round Port
Primary Tube Gauge:
16 Gauge
Fitnotes:
CARB E.O. D-411-11
Vehicle Fitment Information
Vehicle Name
Submodel
Engine
Fitment Information
2002 GMC Sierra 1500
HT
8 Cyl 4.8L
CARB E.O. D-411-11
2002 GMC Sierra 1500
HT
8 Cyl 5.3L
CARB E.O. D-411-11
2002-2003 GMC Sierra 1500
SL
8 Cyl 4.8L
CARB E.O. D-411-11
2002-2003 GMC Sierra 1500
SL
8 Cyl 5.3L
CARB E.O. D-411-11
2002-2004 Chevrolet Silverado 1500
WT
8 Cyl 4.8L
CARB E.O. D-411-11
Page 1 of 25 | Showing 1 - 5 of 122 results
Product Information
GIBSON PERFORMANCE HEADERS
Expertly crafted and tested to top-grade, OE-specific standards, Gibson Performance Headers provides high quality performance without the high level price. Its OE-standard design provides the right fit and the right solution to your vehicle needs.
- Meticulously crafted to OE-specific standards
- Made with top-grade materials in state-of-the-art facilities
- Strict OE requirements in fitment and functionality ensure part is reliable in performance
- Offers unmatched quality at an unmatched price
Gibson Performance Headers offers top-quality replacement parts for the automotive aftermarket.
Need help?Call our product expert1-866-529-0412
Chat with us
Mondays - Sundays7am - 11pm ET | 4am - 8pm PT
Warranty Policy
Right parts, guaranteed. If you find any defects, let us know within 60 days and we’ll take care of it. Check out our Warranty Policy for more details.
Shipping Policy
We ship fast so you can get on the road that much faster. Check out our Shipping Policy for more details.
Easy Return Policy
We’re only happy if you’re happy. If you’re not entirely satisfied with your order, you may be entitled to a refund. Check out our Return Policy for more details.
Customer Reviews
I got these headers with a predator stage 3 kit,,it has changed the whole tone and throttle on my H2 SUT. no doubt there's increases bottom, top, mid..the sound is really cool as well..LS growl..i recommend for sure..
Purchased on Apr 08, 2010
These were used as direct replacement for stock exhaust manifold replacement, sound is just a little deeper but nothing crazy
Purchased on Jan 19, 2015
Im pretty mechaniclly inclined and installed them in about 4 hours. looks great sound good noticed most increase in the mid to top end. But got rear-ended and went head on into a tree before i had to re-torque them...thw front end is destroyed but the headers are still good haha
Purchased on Feb 17, 2009