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Headers for 2005 Hummer H2

We have 9 Items In-stock. Select your vehicle's Submodel to continue.

Gibson - Performance Headers

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
Gibson Headers, Gibson Performance, Mild-Steel, 4-1
$428.01 List Price $711.85 Save $283.84 Availability: In Stock
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  • SKU#: G27GP500
  • Color/Finish: Chrome
  • Emissions: 50-State Legal
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 3-4 business days
  • Bolts/ Studs Included: Yes
  • Collector Attachment Style: OE Style Flange
  • Collector Diameter: Stock
  • Equal Length Primary Tubes: No
  • Gaskets Included: Premium Carbon Composite Gasket
  • Head Flange Style: Stock
  • Head Flange Thickness: 3/8 in.
  • Header Style: Shorty Tuned
  • Includes: Premium gasket, installation hardware
  • Number of Cylinders: 8
  • Port Shape: Round
  • Primary Tube Diameter: 1 5/8 In.
  • Primary Tube Thickness: 14 Gauge
  • Primary Tube Wall Thickness: 14-gauge
  • Provision: EGR
  • Warranty: Lifetime Gibson limited warranty
see more Fits the following 2005 Hummer H2 submodels:
  • 8 Cyl 6.0L | Base
Gibson Headers, Gibson Performance, Stainless Steel, 4-1
$500.42 List Price $836.75 Save $336.33 Availability: In Stock
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  • SKU#: G27GP500S
  • Color/Finish: Natural
  • Emissions: 50-State Legal
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 3-4 business days
  • Bolts/ Studs Included: Yes
  • Collector Attachment Style: OE Style Flange
  • Collector Diameter: Stock
  • Equal Length Primary Tubes: No
  • Gaskets Included: Premium Carbon Composite Gasket
  • Head Flange Style: Stock
  • Head Flange Thickness: 3/8 in.
  • Header Style: Shorty Tuned
  • Includes: Premium gasket, installation hardware
  • Number of Cylinders: 8
  • Port Shape: Round
  • Primary Tube Diameter: 1 5/8 In.
  • Primary Tube Thickness: 16 Gauge
  • Primary Tube Wall Thickness: 16-gauge
  • Warranty: Lifetime Gibson limited warranty
see more Fits the following 2005 Hummer H2 submodels:
  • 8 Cyl 6.0L | Base
Gibson Headers, Gibson Performance, Stainless Steel, 4-1
$539.82 List Price $981.35 Save $441.53 Availability: In Stock
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  • SKU#: G27GP500SC
  • Color/Finish: Silver Ceramic
  • Emissions: 50-State Legal
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 3-4 business days
  • Bolts/ Studs Included: Yes
  • Collector Attachment Style: OE Style Flange
  • Collector Diameter: Stock
  • Equal Length Primary Tubes: No
  • Gaskets Included: Premium Carbon Composite Gasket
  • Head Flange Style: Stock
  • Head Flange Thickness: 3/8 in.
  • Header Style: Shorty Tuned
  • Includes: Premium gasket, installation hardware
  • Number of Cylinders: 8
  • Port Shape: Round
  • Primary Tube Diameter: 1 5/8 In.
  • Primary Tube Thickness: 16 Gauge
  • Primary Tube Wall Thickness: 16-gauge
  • Provision: EGR
  • Warranty: Lifetime Gibson limited warranty
see more Fits the following 2005 Hummer H2 submodels:
  • 8 Cyl 6.0L | Base
Rating: (see review/s)

"2005 Silverado 2500HD 6.0L Ceramic coated header install was easy once stock exhaust was removed. Not much change in tone with stock exhaust cat-back. Did notice increased acceleration. That in itself worth the $. Drove a few hundred miles retorqued the bolts (no change) and no discoloration. I m liking them!" posted by: Sportster on July 9, 2014

JBA Cat4ward Headers

JBA Cat4ward Headers are one of the best performance upgrades available for any application. It is significantly less restrictive than the stock manifolds on a vehicle and dramatically increases engine performance. It is constructed from durable stainless steel that resists distortion, warping, and leaks.

JBA Cat4ward Headers come with heavy duty features and patented technology that helps produce more power, throttle response, and the best flow than any other headers on the market.

JBA Cat4ward Headers also Come with these Features:

  • Mandrel bent primary tubes for smoother flow
  • Oversized exhaust ports accommodate cylinder head porting
  • Engineered with race proven technology for maximum horsepower and torque gains
  • Includes patented JBA Firecone collector, extra thick collector domes, and 3/8 in. CNC laser cut thick flanges
  • Factory style emission connections
JBA Headers, JBA Cat4ward Shorty, Stainless Steel, 4-1
$521.77 List Price $854.50 Save $332.73 Availability: In Stock
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  • SKU#: J211850S3JT
  • Color/Finish: Titanium ceramic coated
  • Emissions: 50-State Legal
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 2-3 business days
  • Number of Cylinders: 8
see more Fits the following 2005 Hummer H2 submodels:
  • 8 Cyl 6.0L | Base
JBA Headers, JBA Cat4ward Shorty, Stainless Steel, 4-1
$437.80 List Price $646.83 Save $209.03 Availability: In Stock
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  • SKU#: J211850S3
  • Color/Finish: Natural
  • Emissions: 50-State Legal
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 2-3 business days
  • Collector Attachment Style: Stock flange
  • Equal Length Primary Tubes: No
  • Head Flange Style: 1-Piece
  • Head Flange Thickness: 0.38 in.
  • Includes: Gasket(s)
  • Number of Cylinders: 8
  • Port Shape: Round
  • Primary Tube Diameter: 1.63 in.
  • Primary Tube Wall Thickness: 14-gauge
  • Warranty: 1-year JBA limited warranty
see more Fits the following 2005 Hummer H2 submodels:
  • 8 Cyl 6.0L | Base
JBA Headers, JBA Cat4ward Shorty, Stainless Steel, 4-1
$566.13 List Price $854.50 Save $288.37 Availability: In Stock
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  • SKU#: J211850S3JS
  • Color/Finish: Silver ceramic coated
  • Emissions: 50-State Legal
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 2-3 business days
  • Number of Cylinders: 8
see more Fits the following 2005 Hummer H2 submodels:
  • 8 Cyl 6.0L | Base

Hedman Painted Hedders

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.

Hedman Headers, Hedman Painted Hedders, Steel, 4-1
$305.59 List Price $750.00 Save $444.41 Availability: In Stock
  • APW Bestseller
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  • SKU#: H5669690
  • Color/Finish: Black
  • Emissions: 49-State Legal - no CA shipments
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 1-2 Business Days
  • Bolts/ Studs Included: Yes
  • Collector Attachment Style: Flange
  • Collector Diameter: Stock
  • Emissions Legality: 49-State Legal - no CA shipments
  • Gaskets Included: Yes
  • Head Flange Style: Standard
  • Head Flange Thickness: 1/4 in.
  • Header Style: Shorty
  • Includes: Premium gasket, installation hardware
  • Number of Cylinders: 8
  • Port Shape: Round
  • Primary Tube Diameter: 1.63 in.
  • Primary Tube Thickness: 18 Gauge
  • Primary Tube Wall Thickness: 18-gauge
  • Warranty: Lifetime Hedman limited warranty
see more Fits the following 2005 Hummer H2 submodels:
  • 8 Cyl 6.0L | Base

Hedman Hi-Tech Coating (HTC) Hedders

HEDMAN – HI-TECH COATING (HTC) HEADERS

Do you drive your vehicle in extreme high heat conditions such as when racing or towing? If you answered yes, then replace your power-robbing stock manifold with Hedman Hi-Tech Coating (HTC) Headers to lower your operating temps and release extra horsepower and torque from your engine. Hedman Headers have always been made in the USA since the company was founded over 50 years ago. Back in the 1980s, Hedman pioneered the use of ceramic metallic coatings for headers after observing its use in the aerospace industry. 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.

  • Handles temps up to 1,400 degrees and protects from corrosion with ceramic metallic coating
  • Proudly manufactured in U.S.A.
  • Perfect for towing vehicles and motor homes
  • The ceramic metallic coating can withstand high-heat situations like racing or towing 
  • Keeps under hood temps lower
  • Will not chip, peel or turn blue like chrome

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

Hedman Headers, Hedman HTC Hedders, Steel, 4-1
$614.30 List Price $1,407.14 Save $792.84 Availability: In Stock
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  • SKU#: H5669696
  • Color/Finish: Metallic ceramic coated
  • Emissions: 49-State Legal - no CA shipments
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Anticipated Ship Out Time: 1-2 Business Days
  • Bolts/ Studs Included: Yes
  • Collector Attachment Style: Flange
  • Collector Diameter: Stock
  • Emissions Legality: 49-State Legal - no CA shipments
  • Gaskets Included: Yes
  • Head Flange Style: Standard
  • Head Flange Thickness: 1/4 in.
  • Header Style: Shorty
  • Includes: Premium gasket, installation hardware
  • Number of Cylinders: 8
  • Port Shape: Round
  • Primary Tube Diameter: 1.63 in.
  • Primary Tube Thickness: 18 Gauge
  • Primary Tube Wall Thickness: 18-gauge
  • Warranty: Lifetime Hedman limited warranty with 5-year limited warranty on coating
see more Fits the following 2005 Hummer H2 submodels:
  • 8 Cyl 6.0L | Base

Borla Stainless Steel Headers

BORLA – STAINLESS STEEL HEADERS

Uncompromised quality and precision manufacturing is what you get in all Borla Stainless Steel Headers. Borla’s Stainless Steel Headers are designed to make your vehicle look and sound better and you will feel the extra horsepower and torque every time you hit the gas pedal. For maximum exhaust flow, pair a Borla Stainless Steel Exhaust System with your Borla Stainless Steel Header and indulge in your engine’s additional horsepower and torque. This writer purchased a Borla exhaust for his truck way back in the 1990s and now that truck with the same Borla exhaust has been driven over 500,000 miles with no trouble at all. The Borla exhaust still looks great and sounds fantastic after many years and many miles of use. A Borla Header does cost a little more than most of the competitor’s headers but for that extra investment you get Borla’s excellent fit and finish, the highest quality T-304 stainless steel and peace-of-mind knowing that you purchased a quality header that will outlive most other brands. Alex Borla’s well-engineered exhausts have exceeded the expectations of car, truck and off-road buffs as well as the professional motorsports community since 1978. Mr. Borla started his company with one single purpose, to engineer the best exhaust systems on the market. Borla’s state-of-the-art manufacturing facility in Tennessee uses high tech computer based CNC manufacturing tooling and equipment and employs America’s finest metal workers. Borla goes the extra distance to provide you with the highest quality, best fitting and nicest sounding exhaust for your driving enjoyment.

NOTE: With the exception of five headers made for Jeep Wranglers, which are a 50 state street legal design, the rest of Borla’s headers are purposely built for off-road or racing use if your vehicle came equipped with a catalytic converter from the factory when new.

  • Manufactured from very high quality T-304 stainless steel, unlike almost all comparable headers
  • Borla has very high corrosion resistant properties, perfect for vehicles in adverse weather regions
  • Manufactured in USA and sold worldwide
  • Precise construction ensures a perfect fit with smooth mandrel bends and smooth but strong welds
  • Available for a wide variety of popular pickups, SUVs, cars and even classic cars, (direct fit)
  • Perfectly matched to Borla’s Stainless Steel Exhausts
Borla Headers, Stainless Steel, 4-1, Natural
$698.99 List Price $824.81 Save $125.82 Availability: In Stock
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  • SKU#: B2517222
  • Emissions: 49-State Legal - no CA shipments
  • Product Fit: Direct Fit
  • Quantity Sold: Set of 2
  • Anticipated Ship Out Time: 2-3 business days
  • Bolts/ Studs Included: Yes
  • Collector Attachment Style: Flange
  • Collector Diameter: 2.5 in.
  • Emissions Legality: Off-Road/Race Use Only
  • Equal Length Primary Tubes: No
  • Gaskets Included: Yes
  • Head Flange Style: Standard
  • Head Flange Thickness: 0.375 in.
  • Header Style: Shorty
  • Includes: Gasket(s)
  • Notes: May require cutting of the factory exhaust and welding for the installation
  • Number of Cylinders: 8
  • Port Shape: Round
  • Primary Tube Diameter: 1.625 in.
  • Primary Tube Thickness: 0.049 in.
  • Warranty: Million-mile Borla limited warranty
see more Fits the following 2005 Hummer H2 submodels:
  • 8 Cyl 6.0L | Base