GMC Sierra 3500 Headers

GIBSON PERFORMANCE HEADERS, 409L STAINLESS STEEL, CERAMIC-COATED, SET OF 2 -- 49-state legal; Not for sale or use in California; Cannot be shipped to California addresses; 1.625 in. tube diameter, 16-gauge tube wall thickness, stock flange connectors, 0.375 in. standard head flange; Premium gasket and installation hardware included; Shorty style; Round head port; These headers are direct fit bolt-on replacement for factory exhaust manifold; Made of high quality 409L stainless steel mandrel-bent tubing to maintain constant exhaust flow for outstanding performance; They feature heavy duty 0.375 in. thick laser cut port flanges and OEM style connections; They attach to OE crossover pipe; Dyno-tuned and engineered to deliver more usable horsepower and torque; These headers increase the engine's efficiency by allowing it to breathe easier and run at cooler temperature; Well suited for lowered and raised vehicles, street, and off-road; Dyno tested to perform best with Gibson's cat-back exhaust system; For vehicles without EGR and air injection.

Fits the following 2002-2006 GMC Sierra 3500 submodels:

• 2004-2006: WT; 8 Cyl 6.0L;
• 2002-2006: SL; 8 Cyl 6.0L;

• 2002-2006: SLE; 8 Cyl 6.0L;

• 2002-2006: SLT; 8 Cyl 6.0L;

• 2002-2005: Base; 8 Cyl 6.0L;

Fits 3 more submodels. (Show all) Show less info

JBA CAT4WARD SHORTY HEADERS, STAINLESS STEEL, TITANIUM CERAMIC, SET OF 2 -- 49-state legal; Not for sale or use in California; Cannot be shipped to California addresses; 1.625 in. tube diameter, 0.375 in. standard head flange; Shorty style; Round head port; They include mandrel-bent stainless steel primary tubes, patented JBA Firecone collector, factory style emission connections, extra thick collector domes, CNC laser-cut flange, and oversized exhaust ports; Made of tough and durable stainless steel; Constructed through race-proven technology for maximum horsepower and torque gains; They improve throttle response, resist warping, prevent leakage, increase flow, and accommodate cylinder head porting; Direct replacement for factory manifold, installation hardware kit included; For vehicles without EGR; Easy installation.

Fits the following 2007-2007 GMC Sierra 3500 submodels:

• 2007-2007: All Submodels; All Engines;

HEDMAN STANDARD DUTY EXHAUST HEADERS, STEEL, BLACK-PAINTED -- 49-state legal; Not for sale or use in California; Cannot be shipped to California addresses; 1.63 in. tube diameter, 18-gauge tube wall thickness, stock flange collector, 0.25 in. standard head flange; Premium gasket and installation hardware included; Shorty style; Round head port; They feature 18-gauge mandrel-bent primary tubes; Protected by factory applied black paint for pre-installation protection; Made in USA; Tubular exhaust manifold system.

Fits the following 2001-2007 GMC Sierra 3500 submodels:

• 2007-2007: Classic SL; 8 Cyl 6.0L;
• 2007-2007: Classic SLE; 8 Cyl 6.0L;

• 2007-2007: Classic SLT; 8 Cyl 6.0L;

• 2007-2007: Classic WT; 8 Cyl 6.0L;

• 2004-2005: WT; 8 Cyl 6.0L;

• 2002-2005: Base; 8 Cyl 6.0L;

• 2001-2005: SLE; 8 Cyl 6.0L;

• 2001-2005: SLT; 8 Cyl 6.0L;

• 2001-2002: SL; 8 Cyl 6.0L;

Fits 7 more submodels. (Show all) Show less info

FLOWTECH UNIVERSAL STANDARD BLOCK HUGGER HEADERS, BLACK -- 49-state legal; Not for sale or use in California; Cannot be shipped to California addresses; 1.625 in. tube size; 2.5 in. collector size; Includes gaskets and all necessary hardware; Features electrostatically applied satin black paint, computer-controlled mandrel-bent 16-gauge tubing, and precision die-cut exhaust port flanges; Engineered and tested for leak-proof seal; Universal only for custom cars, trucks and street rods using V8 265-400 displacement, Chevy small block engines.

Fits the following 2001-2007 GMC Sierra 3500 submodels:

• 2007-2007: Classic SL; 8 Cyl 6.6L;
• 2007-2007: Classic SLE; 8 Cyl 6.6L;

• 2007-2007: Classic SLT; 8 Cyl 6.6L;

• 2007-2007: Classic WT; 8 Cyl 6.6L;

• 2004-2006: WT; 8 Cyl 6.6L;

• 2001-2006: SL; 8 Cyl 6.6L;

• 2001-2006: SLE; 8 Cyl 6.6L;

• 2001-2006: SLT; 8 Cyl 6.6L;

• 2002-2005: Base; 8 Cyl 6.6L;

Fits 7 more submodels. (Show all) Show less info

BBK CNC-SERIES SHORTY HEADERS, POLISHED, SET OF 2 -- 49-state legal; Not for sale or use in California; Cannot be shipped to California addresses; 1.75 in. tube diameter, 16-gauge tube wall thickness, 0.375 in. standard head flange; Includes gaskets, hardware, and installation instructions; With air fitting connectors; Shorty style; Round head port; Feature CNC mandrel-bent tubing for unrestrictive airflow and one-piece laser cut flange for added strength and durability; Dyno and pressure tested to ensure leak-free and maximum performance; Easy direct bolt-on installation.

Fits the following 2001-2007 GMC Sierra 3500 submodels:

• 2007-2007: Classic SL; 8 Cyl 6.0L;
• 2007-2007: Classic SLE; 8 Cyl 6.0L;

• 2007-2007: Classic SLT; 8 Cyl 6.0L;

• 2007-2007: Classic WT; 8 Cyl 6.0L;

• 2006-2006: WT; 8 Cyl 6.0L;

• 2001-2006: SL; 8 Cyl 6.0L;

• 2001-2006: SLE; 8 Cyl 6.0L;

• 2001-2006: SLT; 8 Cyl 6.0L;

• 2004-2005: WT; 8 Cyl 6.0L; "GAS"

• 2003-2005: Base; 8 Cyl 6.0L; "GAS"

• 2003-2005: SLE; 8 Cyl 6.0L; "GAS"

• 2003-2005: SLT; 8 Cyl 6.0L; "GAS"

• 2002-2002: Base; 8 Cyl 6.0L;

Fits 11 more submodels. (Show all) Show less info