Looking for aftermarket parts to modify or upgrade your GMC Sierra 2500 HD with headers & manifolds? At Tunersports.com we carry a huge selection of the top name brand performance headers & manifold parts and accessories for your Sierra 2500 HD.
Whether you have a 2001 or 2023 GMC Sierra 2500 HD in AT4 to WT trim we have you covered. We have 29 headers & manifolds available to mod your Sierra 2500 HD. All parts have free shipping to the Continental US 48 States.
 IN STOCK 46-40024Advanced Flow Engineering, Inc. (aFe) produces high flow, high performance air filters & intake systems for the automotive industry. Founded in April, 1999, aFe was created to address an obvious need in the automotive aftermarket industry: a lack of choice for a high performance aftermarket air filt... aFe Power BladeRunner Ported Ductile Iron Exhaust Manifold 01-16 GM Diesel Trucks V8-6.6L (td) 2001-2002 GMC Sierra 2500 HD SL 2001-2016 GMC Sierra 2500 HD SLE / SLT 2002-2005 GMC Sierra 2500 HD Base 2003-2014 GMC Sierra 2500 HD WT 2006-2006 GMC Sierra 2500 HD SL 2011-2016 GMC Sierra 2500 HD Denali 2015-2016 GMC Sierra 2500 HD Base $675.00 |
 IN STOCK 46-60029The aFe Bladerunner Turbo Inlet Manifold increases performance to your Duramax by 23hp and 57lbs x ft. torque while increasing air flow 73-percent over the factory turbo inlet. The Bladerunner turbo inlet manifold also improves turbo spool up times and lowers exhaust gas temperature (EGTs). This u... aFe Bladerunner Manifolds Turbo Inlet MAN Turbo Inlet GM Diesel Trucks 04.5-05 V8-6.6L (td) 2004-2005 GMC Sierra 2500 HD Base / SLE / SLT / WT $411.00 |
 OUT OF STOCK 48-34009-PKConstruction: These unique up pipes are constructed of 2" mandrel-bent 304 stainless steel tubing with a .120" wall for strength and durability. 2" Inner Liner Flex Pipes: The down-pipes utilizes heavy duty 2" flex tubes with internal inner liner. Leak-Free Seal: High quality 3/8" thick flanges are ... aFe 01-04 GM V8-6.6L LB7 Twisted Steel Manifold w/ Up Pipe 2001-2002 GMC Sierra 2500 HD SL 2001-2004 GMC Sierra 2500 HD SLE / SLT 2002-2004 GMC Sierra 2500 HD Base 2003-2004 GMC Sierra 2500 HD WT $1,278.00 |
 OUT OF STOCK 48-341451-3/4" 304 Stainless Steel Construction: This system is constructed of 1-3/4" mandrel-bent 304 stainless steel tubing for maximum strength and durability. Powerful Sound: This system produces a powerful sound unleashing all available horsepower and torque. Installation: Utilizing factory style fla... aFe Twisted 1-3/4in 304SS Shorty Header 20-23 GM 2500/3500HD 6.6L V8 2020-2021 GMC Sierra 2500 HD Base 2020-2023 GMC Sierra 2500 HD AT4 / Denali / SLE / SLT 2022-2023 GMC Sierra 2500 HD Pro $1,052.00 |
 OUT OF STOCK 48-44001The new Twisted Steel performance header from aFe Power is redefining the header industry with new pulse control technology. aFe engineers have designed this header using optimum tube lengths and mitered collectors for maximum flow and velocity for power delivery across the entire power band. Combin... aFe Power Twisted Steel Headers 409 Stainless Steel 02-13 GM Silverado/Sierra 1500 V8 GMT800/GMT900 2003-2005 GMC Sierra 2500 HD Base 2003-2013 GMC Sierra 2500 HD SLE / SLT / WT 2006-2006 GMC Sierra 2500 HD SL $1,052.00 |
 OUT OF STOCK 48-34139Stainless Steel Construction: The headers are constructed out of heavy duty gauge, mandrel-bent 304 stainless steel tubing with a .120" wall for strength and durability. The up-pipes and down-pipe are constructed out of 2" and 3" mandrel-bent 304 brush finished stainless steel tubing.
Optimized Tube... aFe Twisted Steel Headers Up-Pipes & Down-Pipe 11-15 GM Diesel Trucks V8-6.6L (td) LML 2011-2014 GMC Sierra 2500 HD WT 2011-2015 GMC Sierra 2500 HD Denali / SLE / SLT 2015-2015 GMC Sierra 2500 HD Base $2,410.00 |
 IN STOCK - LOW 4006These BBK Performance shorty tuned Length exhaust Headers are designed and constructed as direct fit replacements for all 99-09 GM Truck and SUV 6.0L applications. Each header is manufactured with 1-5/8 CNC mandrel bent tubing that offers unrestricted exhaust flow for increased horsepower and torque... BBK 99-04 GM Truck SUV 6.0 Shorty Tuned Length Exhaust Headers - 1-3/4 Titanium Ceramic 2001-2002 GMC Sierra 2500 HD SL 2001-2013 GMC Sierra 2500 HD SLE / SLT 2002-2005 GMC Sierra 2500 HD Base 2003-2013 GMC Sierra 2500 HD WT 2006-2006 GMC Sierra 2500 HD SL 2011-2013 GMC Sierra 2500 HD Denali $499.99 |
 IN STOCK - DROPSHIPS 40060These BBK Performance shorty tuned Length exhaust Headers are designed and constructed as direct fit replacements for all 99-09 GM Truck and SUV 6.0L applications. Each header is manufactured with 1-5/8 CNC mandrel bent tubing that offers unrestricted exhaust flow for increased horsepower and torque... BBK 99-04 GM Truck SUV 6.0 Shorty Tuned Length Exhaust Headers - 1-3/4 Silver Ceramic 2001-2002 GMC Sierra 2500 HD SL 2001-2013 GMC Sierra 2500 HD SLE / SLT 2002-2005 GMC Sierra 2500 HD Base 2003-2013 GMC Sierra 2500 HD WT 2006-2006 GMC Sierra 2500 HD SL 2011-2013 GMC Sierra 2500 HD Denali $549.99 |
 IN STOCK - LOW 1041460Replaces factory driver's side "pinched down" unit; Restores exhaust flow and balances the V8 engine for smoother running; Improves exhaust velocity to drive the turbocharger; Improves power; Direct, bolt-in replacement; Tapped to accept the most popular EGT probes; High-silicon ductile iron; Lower ... BD Diesel Manifold Exhaust - 2001-2010 Duramax 2001-2002 GMC Sierra 2500 HD SL 2001-2010 GMC Sierra 2500 HD SLE / SLT 2002-2005 GMC Sierra 2500 HD Base 2003-2010 GMC Sierra 2500 HD WT 2006-2006 GMC Sierra 2500 HD SL $191.72 |
 OUT OF STOCK 1046203For AirWerks S300 T3 Mount Turbos... BD Diesel PEDESTAL KIT - Chevy Duramax T3 Mount Turbo 2001-2002 GMC Sierra 2500 HD SL 2001-2007 GMC Sierra 2500 HD SLE / SLT 2002-2005 GMC Sierra 2500 HD Base 2003-2007 GMC Sierra 2500 HD WT 2006-2006 GMC Sierra 2500 HD SL $275.95 |
 SHIPS FROM MANUFACTURER GP119S-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 99-02 Chevrolet Silverado 2500 Base 6.0L 1-5/8in 16 Gauge Performance Header - Ceramic Coated 2001-2002 GMC Sierra 2500 HD SL / SLE / SLT 2002-2002 GMC Sierra 2500 HD Base $762.37 |
 IN STOCK 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 2001-2002 GMC Sierra 2500 HD SL 2001-2003 GMC Sierra 2500 HD SLE / SLT 2002-2003 GMC Sierra 2500 HD Base 2003-2003 GMC Sierra 2500 HD WT $762.38 |
 SHIPS FROM MANUFACTURER 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 2004-2005 GMC Sierra 2500 HD Base / SLE / SLT / WT $762.38 |
 IN STOCK GP500S-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 02-06 Cadillac Escalade Base 6.0L 1-5/8in 16 Gauge Performance Header - Ceramic Coated 2002-2002 GMC Sierra 2500 HD SL 2002-2005 GMC Sierra 2500 HD Base 2002-2006 GMC Sierra 2500 HD SLE / SLT 2003-2006 GMC Sierra 2500 HD WT 2006-2006 GMC Sierra 2500 HD SL $762.38 |
 IN STOCK - DROPSHIPS GP119SEvery 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 99-02 Chevrolet Silverado 2500 Base 6.0L 1-5/8in 16 Gauge Performance Header - Stainless 2001-2002 GMC Sierra 2500 HD SL / SLE / SLT 2002-2002 GMC Sierra 2500 HD Base $641.03 |
 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 2001-2002 GMC Sierra 2500 HD SL 2001-2003 GMC Sierra 2500 HD SLE / SLT 2002-2003 GMC Sierra 2500 HD Base 2003-2003 GMC Sierra 2500 HD WT $641.03 |
 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 2004-2005 GMC Sierra 2500 HD Base / SLE / SLT / WT $641.03 |
 IN STOCK - LOW GP500SEvery 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 02-06 Cadillac Escalade Base 6.0L 1-5/8in 16 Gauge Performance Header - Stainless 2002-2002 GMC Sierra 2500 HD SL 2002-2005 GMC Sierra 2500 HD Base 2002-2006 GMC Sierra 2500 HD SLE / SLT 2003-2006 GMC Sierra 2500 HD WT 2006-2006 GMC Sierra 2500 HD SL $641.03 |
 OUT OF STOCK 1850S-1JBA 99-02 GM Truck 6.0L LS w/o A.I.R. w/EGR 1-5/8in Primary Raw 409SS Cat4Ward Header 2001-2002 GMC Sierra 2500 HD SL / SLE / SLT 2002-2002 GMC Sierra 2500 HD Base $662.45 |
 OUT OF STOCK 1850S-1JSJBA 99-02 GM Truck 6.0L LS w/o A.I.R. w/EGR 1-5/8in Primary Silver Ctd Cat4Ward Header 2001-2002 GMC Sierra 2500 HD SL / SLE / SLT 2002-2002 GMC Sierra 2500 HD Base $813.95 |
 OUT OF STOCK 1850S-2JBA 02-13 GM Truck 4.8L/5.3L LS Raw 409 Cat4Ward Header 2007-2014 GMC Sierra 2500 HD WT 2007-2019 GMC Sierra 2500 HD SLE / SLT 2011-2019 GMC Sierra 2500 HD Denali 2015-2019 GMC Sierra 2500 HD Base $642.95 |
 IN STOCK - LOW 1850S-2JSJBA 02-13 GM Truck 4.8L/5.3L LS Silver Ctd Cat4Ward Header 2007-2014 GMC Sierra 2500 HD WT 2007-2019 GMC Sierra 2500 HD SLE / SLT 2011-2019 GMC Sierra 2500 HD Denali 2015-2019 GMC Sierra 2500 HD Base $799.95 |
 OUT OF STOCK 1850S-2JTJBA 02-13 GM Truck 4.8L/5.3L LS Ti Ctd Cat4Ward Header 2007-2014 GMC Sierra 2500 HD WT 2007-2019 GMC Sierra 2500 HD SLE / SLT 2011-2019 GMC Sierra 2500 HD Denali 2015-2019 GMC Sierra 2500 HD Base $799.95 |
 OUT OF STOCK 1850S-3JBA 03-06 GM Truck 6.0L LS w/o EGR 1-5/8in Primary Raw 409SS Cat4Ward Header 2003-2005 GMC Sierra 2500 HD Base 2003-2006 GMC Sierra 2500 HD SLE / SLT / WT 2006-2006 GMC Sierra 2500 HD SL $641.45 |
 IN STOCK - LOW 1850S-3JSJBA 03-06 GM Truck 6.0L LS w/o EGR 1-5/8in Primary Silver Ctd Cat4Ward Header 2003-2005 GMC Sierra 2500 HD Base 2003-2006 GMC Sierra 2500 HD SLE / SLT / WT 2006-2006 GMC Sierra 2500 HD SL $799.95 |