View our Specials! Coupon Code: SaveIn2026
Looking for aftermarket parts to modify or upgrade your Chevrolet Avalanche 2500 with headers & manifolds? At Tunersports.com we carry a huge selection of the top name brand performance headers & manifold parts and accessories.
 IN STOCK - DROPSHIPS GP131S-CEvery Gibson Performance Header is Dyno-tuned and engineered to deliver more usable horsepower and torque at low and mid-range RPM highway speeds. Improves engines ability to breathe and cooler operating engine temperature. Designed as a direct replacement for the factory manifolds, using the stock ... Gibson 01-03 Chevrolet Silverado 3500 Base 8.1L 1-3/4in 16 Gauge Performance Header - Ceramic Coated 2002-2003 Chevrolet Avalanche 2500 Base $842.63 |
 IN STOCK - DROPSHIPS GP134S-CEvery Gibson Performance Header is Dyno-tuned and engineered to deliver more usable horsepower and torque at low and mid-range RPM highway speeds. Improves engines ability to breathe and cooler operating engine temperature. Designed as a direct replacement for the factory manifolds, using the stock ... Gibson 05-06 Chevrolet Avalanche 2500 LS 8.1L 1-3/4in 16 Gauge Performance Header - Ceramic Coated 2004-2004 Chevrolet Avalanche 2500 Base 2005-2006 Chevrolet Avalanche 2500 LS / LT $799.49 |
 IN STOCK - LOW GP131SEvery Gibson Performance Header is Dyno-tuned and engineered to deliver more usable horsepower and torque at low and mid-range RPM highway speeds. Improves engines ability to breathe and cooler operating engine temperature. Designed as a direct replacement for the factory manifolds, using the stock ... Gibson 01-03 Chevrolet Silverado 3500 Base 8.1L 1-3/4in 16 Gauge Performance Header - Stainless 2002-2003 Chevrolet Avalanche 2500 Base $670.67 |
 SHIPS FROM MANUFACTURER GP134SEvery Gibson Performance Header is Dyno-tuned and engineered to deliver more usable horsepower and torque at low and mid-range RPM highway speeds. Improves engines ability to breathe and cooler operating engine temperature. Designed as a direct replacement for the factory manifolds, using the stock ... Gibson 05-06 Chevrolet Avalanche 2500 LS 8.1L 1-3/4in 16 Gauge Performance Header - Stainless 2004-2004 Chevrolet Avalanche 2500 Base 2005-2006 Chevrolet Avalanche 2500 LS / LT $670.67 |
 OUT OF STOCK 1860SJBA shorty headers are one of the foremost performance upgrades you can bestow upon your beloved car, truck, or SUV. JBA Headers are significantly less restrictive than stock manifolds and dramatically increase the power and efficiency of your engine. Each header is constructed from durable stainles... JBA 01-03 Gm Truck 8.1L BBC w/o EGR/A.I.R. 1-3/4in Primary Raw 409SS Cat4Ward Header 2002-2003 Chevrolet Avalanche 2500 Base $672.59 |
 IN STOCK 1860SJSJBA shorty headers are one of the foremost performance upgrades you can bestow upon your beloved car, truck, or SUV. JBA Headers are significantly less restrictive than stock manifolds and dramatically increase the power and efficiency of your engine. Each header is constructed from durable stainles... JBA 01-03 Gm Truck 8.1L BBC w/o EGR/A.I.R. 1-3/4in Primary Silver Ctd Cat4Ward Header 2002-2003 Chevrolet Avalanche 2500 Base $851.03 |