{
"lazyNodes": false,
"abFitnotesFlag": false,
"abCrawlReviews": false,
"productOptionsCookie": false,
"orderDelayFlag": false,
"skipSessionCookie": false,
"covidMessage": false,
"fullTitleCookie": false,
"nrLoggerCookie": false,
"checkoutReviewCookie": false,
"productOptionSeqCookie": false,
"maintenanceFlag": false,
"bufferETACookie": false,
"multiShippingDiscountFlag": false,
"newFitmentFlag": false,
"surveyOptInFlag": false,
"crossSellFlag": false,
"skuMappingFlag": false,
"paySplitCookie": false,
"callDisableFlag": false,
"zipPaymentFlag": "u",
"hassleFreeReturn": false,
"lifetimeReplacement": false,
"cpn_off": false
}2003 Chevrolet Avalanche 1500 Headers
Shop Catalog
- 2003 Chevrolet Avalanche 1500 Z71 8 Cyl 5.3L
- 2003 Chevrolet Avalanche 1500 On Road Edition 8 Cyl 5.3L
- 2003 Chevrolet Avalanche 1500 WBH 8 Cyl 5.3L
- 2003 Chevrolet Avalanche 1500 Base 8 Cyl 5.3L
- 2003 Chevrolet Avalanche 1500 North Face 8 Cyl 5.3L
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.
- 2003 Chevrolet Avalanche 1500 On Road Edition 8 Cyl 5.3L Intended For Race Use Only; 1.625 in. Primary Tubing
- 2003 Chevrolet Avalanche 1500 Z71 8 Cyl 5.3L Intended For Race Use Only; 1.625 in. Primary Tubing
- 2003 Chevrolet Avalanche 1500 WBH 8 Cyl 5.3L Intended For Race Use Only; 1.625 in. Primary Tubing
- 2003 Chevrolet Avalanche 1500 Base 8 Cyl 5.3L Intended For Race Use Only; 1.625 in. Primary Tubing
- 2003 Chevrolet Avalanche 1500 North Face 8 Cyl 5.3L Intended For Race Use Only; 1.625 in. Primary Tubing
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.
- 2003 Chevrolet Avalanche 1500 Z71 8 Cyl 5.3L
- 2003 Chevrolet Avalanche 1500 On Road Edition 8 Cyl 5.3L
- 2003 Chevrolet Avalanche 1500 WBH 8 Cyl 5.3L
- 2003 Chevrolet Avalanche 1500 Base 8 Cyl 5.3L
- 2003 Chevrolet Avalanche 1500 North Face 8 Cyl 5.3L
WARNING: This product can expose you to chemicals including chemicals, 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.
- 2003 Chevrolet Avalanche 1500 On Road Edition 8 Cyl 5.3L 1.625 in. Primary Tubing
- 2003 Chevrolet Avalanche 1500 Z71 8 Cyl 5.3L 1.625 in. Primary Tubing
- 2003 Chevrolet Avalanche 1500 WBH 8 Cyl 5.3L 1.625 in. Primary Tubing
- 2003 Chevrolet Avalanche 1500 Base 8 Cyl 5.3L 1.625 in. Primary Tubing
- 2003 Chevrolet Avalanche 1500 North Face 8 Cyl 5.3L 1.625 in. Primary Tubing
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.
- 2003 Chevrolet Avalanche 1500 On Road Edition 8 Cyl 5.3L RWD, Stock Replacement, Bolts Directly To Factory Headpipes, Without EGR, 50 States Emissions Legal, CARB E.O. D-115-16
- 2003 Chevrolet Avalanche 1500 Base 8 Cyl 5.3L 4WD, Stock Replacement, Bolts Directly To Factory Headpipes, Without EGR, 50 States Emissions Legal, CARB E.O. D-115-16
- 2003 Chevrolet Avalanche 1500 North Face 8 Cyl 5.3L 4WD, Stock Replacement, Bolts Directly To Factory Headpipes, Without EGR, 50 States Emissions Legal, CARB E.O. D-115-16
- 2003 Chevrolet Avalanche 1500 Z71 8 Cyl 5.3L 4WD, Stock Replacement, Bolts Directly To Factory Headpipes, Without EGR, 50 States Emissions Legal, CARB E.O. D-115-16
- 2003 Chevrolet Avalanche 1500 WBH 8 Cyl 5.3L RWD, Stock Replacement, Bolts Directly To Factory Headpipes, Without EGR, 50 States Emissions Legal, CARB E.O. D-115-16
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.
- 2003 Chevrolet Avalanche 1500 All Submodels All Engines CARB E.O. D-411-11
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.
- 2003 Chevrolet Avalanche 1500 All Submodels All Engines CARB E.O. D-411-11
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.
- 2003 Chevrolet Avalanche 1500 Z71 8 Cyl 5.3L
- 2003 Chevrolet Avalanche 1500 On Road Edition 8 Cyl 5.3L
- 2003 Chevrolet Avalanche 1500 WBH 8 Cyl 5.3L
- 2003 Chevrolet Avalanche 1500 Base 8 Cyl 5.3L
- 2003 Chevrolet Avalanche 1500 North Face 8 Cyl 5.3L
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.
- 2003 Chevrolet Avalanche 1500 All Submodels All Engines Shorty Headers
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.
- 2003 Chevrolet Avalanche 1500 All Submodels All Engines With Catted Connection Kit, Intended For Race Use Only
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.
- 2003 Chevrolet Avalanche 1500 All Submodels All Engines With Catted Connection Kit, Intended For Race Use Only
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.
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.
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.
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.
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.
Top Rated Products
Popular Products
FLOWTECH – SHORTY HEADERS
Get maximum ground clearance along with Flowtech performance with these cold-rolled steel Shorty headers. They feature port seals that are O-ringed to prevent leaks and are designed to fit without hassles for performance that wil...
HOOKER SHORTY HEADERS
Revamp your ride with the enhanced flow and enormous power gains offered by Hooker’s shorty headers. They’re designed with first-class welds and premium steel for lasting sturdiness and incomparable performance. Since Gary H...
KOOKS HEADERS
You can choose from a wide selection of Kooks headers to get the most out of your exhaust system and make more power. They’re hand-made in America with high-grade stainless steel and designed to work with Kooks’ exhaust components or with y...
BBK HEADERS
You can get a substantial increase in true horsepower – up to 23 extra to be more precise – by getting a BBK header in there to optimize your vehicle’s air flow. Aftermarket performance leader BBK specializes in throttle bodies, cold ai...
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 you...
Product Questions & Answers
Helpful Automotive Resources
