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GMC K2500 Headers

We have 7 Items In-stock. Select a year to continue.
$237.80 List Price $364.95 Save $127.15 Availability: In Stock
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PACESETTER – SHORTY HEADERS

Pacesetter’s Shorty headers are proven to increase horsepower, torque, fuel economy and also give you a nice new rumble. Pacesetter, known for their exhausts, has been a leading manufacturer of performance headers and exhaust systems since their inception in 1974.

  • Designed to replace factory exhaust manifold
  • Streamlines air flow
  • Thick, machined steel flanges
  • Connects right to factory Y pipe
  • Choose ArmorCoat ceramic coat or black painted finish
  • Made from 16-gauge aluminized steel that is corrosion-resistant
  • Backed by a 3-year warranty
  • Includes mounting hardware and adapters
  • Proven to improve torque, horsepower and gas mileage
  • Made for V6 and V8 SUVs and trucks
  • Direct fit by vehicle year, make and model
  • Designed and manufactured in the USA
  • SKU#: P40701320
  • Brand: Pacesetter
  • Fit Note: Stock Location;W/O Air Injection
  • Color/Finish: Black
  • Emissions: 50-State Legal
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 1-2 Business Days
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Fits the following GMC K2500 Years:
  • 1996-1999 | 8 Cyl 5.7L | Sierra SL, Sierra SLE, Sierra SLT
Rating: (see review/s)

"I bought these to replace the cast iron manifolds. Everything bolted up to the existing locations with no modifications required to the exhaust system. The installation took a while, but it wasn't difficult. It would have gone faster with two people. The paint came off on the first drive, even though I tried curing it using the heat from the exhaust gas. I bought a can of high-heat paint and repainted them. had to remove them to do that, though. It would have been nice if they came painted with high-heat paint. As is typical with headers, the bolts don't stay tight. I drilled holes in the bolts and safety wired them in pairs. Don't even bother with the included gaskets. Buy a set of steel reinforced ones as the paper ones blow out fairly easily. The performance increase was dramatic. The engine was responsive to the throttle anyway, but the headers improved on that quite a bit. Gas mileage increased about 1 mpg as well. Used to average 13.5 mpg, now it's 14.6 mpg. With these headers feeding flow master mufflers, it sounds like a truck should sound - meaty and powerful." posted by: 96GMCTruck on September 8, 2011

"I put the headers on my 93 GMC Sierra with a 350. ZZ4 block bored .030 over and Edelbrock Multi-ponit fuel injection system and a strong cam. Roller setup. Aluminum E-tec heads and these headers. Sounds great. Lots of powers. and looks good. Buying the coated shortys would be good for an engine with this much power. 500+ RWHP" posted by: MetalMikeJr on January 20, 2010

$355.20 List Price $765.41 Save $410.21 Availability: In Stock
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GIBSON – PERFORMANCE HEADERS

Gibson’s Performance Headers are proven to increase horsepower by an impressive 20 hp and torque by as much as 30 lbs – a significant boost whether you’re on the track or the street. Gibson is known as the leading manufacturer of street-legal, high performance exhaust systems for trucks, SUVs, diesels, off-road vehicles and RVs.

  • Designed to replace factory exhaust manifold and utilize factory cross-over pipes
  • Streamlines air flow
  • Thick, 3/8” heavy-duty laser-cut flanges will not warp or leak - guaranteed
  • Choose ceramic coat, nickel-plated or stainless steel finish
  • Backed by a lifetime warranty
  • No welding required – easy to bolt-on
  • Engine lasts longer because it operates at cooler temperatures
  • Improved efficiency also directly improves gas mileage
  • Proven to improve torque by up to 30 lbs and horsepower up to 20 hp
  • Direct fit by vehicle year, make and model
  • Designed and manufactured in the USA
  • SKU#: G27GP102S
  • Brand: Gibson
  • Fit Note: 4WD
  • Color/Finish: Natural
  • Emissions: 50-State Legal
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 1-2 Business Days
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Fits the following GMC K2500 Years:
  • 1998 | 8 Cyl 5.0L | Sierra SL, Sierra SLE, Sierra SLT
$715.25 List Price $1,007.32 Save $292.07 Availability: In Stock
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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; 1.5 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 with air injection; Easy installation.
  • SKU#: J211832S2JT
  • Brand: JBA
  • Fit Note: Crew Cab Pickup, With Air Injector, Extended Cab Pickup, With Air Injector, Standard Cab Pickup, With Air Injector
  • Color/Finish: Titanium ceramic coated
  • Emissions: 50-State Legal
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 2-3 business days
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Fits the following GMC K2500 Years:
  • 1998-2000 | 8 Cyl 5.7L | Sierra SL, Sierra SLE, Sierra SLT
  • 1998 | 8 Cyl 5.0L | Sierra SL, Sierra SLE, Sierra SLT
$182.09 List Price $432.86 Save $250.77 Availability: In Stock
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HEDMAN – PAINTED HEADERS

Is that power-robbing stock manifold still on your vehicle? If you answered yes, then replace it with a Hedman Painted Header to lower your operating temps and release extra horsepower and torque from your engine. These headers are designed for painting, so order a can of header paint in the color that best suits your vehicle. Hedman Headers have always been made in the USA since the company was founded over 50 years ago. Bob Hedman started out making headers as a one man shop but word spread fast about the horsepower and torque that Hedman headers were producing. His headers have been in demand by top engine builders and racers since the start. Hedman’s time perfecting headers on the track and on the dyno ensures you will get optimum performance with every Hedman Header whether it is installed on your race car or daily driver.

  • Perfect for hot rod builds on a tight budget
  • Proudly manufactured in U.S.A.
  • Tubing size is 16 to 18 gauge depending on model
  • Size of flanges are 5/16 inch
  • These headers are designed to be painted, so pick up a can of header paint in a color of your choice

NOTE: Not legal for use or sale in California on vehicles that came equipped with emission controls from the factory.

  • SKU#: H5669440
  • Brand: Hedman
  • Fit Note: 4WD
  • Color/Finish: Black
  • Emissions: 49-State Legal - no CA shipments
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 2-3 business days
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Fits the following GMC K2500 Years:
  • 1994-1995 | 8 Cyl 5.7L | Sierra SL, Sierra SLT
  • 1988-1995 | 8 Cyl 5.7L | Sierra SLE
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$439.95 List Price $655.45 Save $215.50 Availability: In Stock
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PATRIOT SPECIFIC FIT HEADERS, METALLIC CERAMIC-COATED, SET OF 2 -- 49-state legal; Not for sale or use in California; Cannot be shipped to California addresses; 1.75 in. tube diameter, 3 in. collector; Includes gaskets, hardware, collector reducers, and installation instructions; Full-length style; SAP port shape; Lowers under hood temperatures for more power and extended product life; Easy to maintain; It has thick machined flanges for great seal; Its high flow mandrel-bent mild steel tubing provides greater horsepower and torque; Big block frame stands and motor mounts must be used to insure proper engine location and header fit; Non-catalytic converter equipped; Reducers available with oxygen sensor fitting.
  • SKU#: P1RH80541
  • Brand: Patriot
  • Emissions: 49-State Legal - no CA shipments
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 1-2 Business Days
 
Fits the following GMC K2500 Years:
  • 1982-1986 | 8 Cyl 6.2L | Base, High Sierra, Sierra Classic
  • 1979-1986 | 8 Cyl 5.7L | Base, High Sierra, Sierra Classic
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$153.59 List Price $181.24 Save $27.65 Availability: In Stock
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FLOWTECH I STANDARD FULL-LENGTH HEADERS, SATIN BLACK HI-TEMPERATURE PAINTED -- 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, 3 in. weld-on collector, standard head flange; All mounting hardware such as bolts, nuts, and premium gasket are included; Full-length style; Round head port; These headers are precision-engineered and leak-tested to provide the maximum performance and fuel efficiency of your engine; Formed from specially selected 0.060 cold roll flash controlled tubing with high quality electrostatically-applied satin black paint finish; They feature Flowtech's exclusive, thick, and mandrel-formed power plenum collector; All ports are precisely fitted and finished with sturdy and leaf-proof o-ringed port seals; Must modify stock exhaust to retain catalytic converters; Applications with oxygen sensor use reducer part number 10105 for 2.5 in. 3-bolt flange or part number 10110 for 3 in. 3-bolt flange; Will not fit angle plug heads; Fits with OE factory equipped style transmission only; Catalytic converter compatible y-pipe available separately.
  • SKU#: F3111504
  • Brand: Flowtech
  • Fit Note: Automatic Transmission, Without A.I.R. Tubes, With Oxygen Sensor- Use Reducer PN[10105FLT] For 2.5 in. Flange Or PN[10110FLT] For 3 in., Standard Transmission, Without A.I.R. Tubes, With Oxygen Sensor- Use Reducer PN[10105FLT] For 2.5 in. Flange Or PN[10110FLT] For 3 in.
  • Color/Finish: Black
  • Emissions: 49-State Legal - no CA shipments
  • Product Fit: Minor Modifications
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: Same day - 1 business day
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Fits the following GMC K2500 Years:
  • 1994-1995 | 8 Cyl 5.7L | Sierra SL, Sierra SLT
  • 1988-1995 | 8 Cyl 5.7L | Sierra SLE
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$271.21 List Price $320.03 Save $48.82 Availability: In Stock
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HOOKER COMPETITION FULL-LENGTH HEADERS, BLACK HI-TEMPERATURE PAINT -- 1.625 in. tube diameter, 16-gauge tube wall thickness, 2.5 in. flange collector, 8 in. collector length, 0.3125 in. standard head flange; They include all the necessary hardware for complete installation; Sap shape port; Full-length style; They feature tuned-length primary tubes for maximum exhaust scavenging and velocity, light but sturdy 16-gauge mild steel mandrel-bent tubing for smooth exhaust flow, long transition collector for decreased back pressure, and machined flanges for a perfect seal; Designed for optimal performance and industry's best welds for durability; Exhaust systems can also be fabricated using either Hooker Super Competition Aero Chamber mufflers, Maximum Flow mufflers, Super Competition turbo mufflers, Competition turbo mufflers or header type Hooker mufflers; Equipped with a fitting to accept the stock oxygen sensor; With Hooker's limited warranty.
  • SKU#: H262462
  • Brand: Hooker
  • Fit Note: Automatic Transmission, Column Shifter, Legal Only For Off-Highway/Racing Use
  • Color/Finish: Black
  • Emissions: For off road/track use
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 1-2 Business Days
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Fits the following GMC K2500 Years:
  • 1994-1995 | 8 Cyl 5.7L | Sierra SL, Sierra SLT
  • 1988-1995 | 8 Cyl 5.7L | Sierra SLE
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Select more GMC K2500 parts under Headers, Manifolds & Components from list below.