2003 Hummer H2 Performance Exhaust Systems

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    • (0 reviews)
      # mpn673376
      Hummer H2 2003, Mach Force XP™ 409 SS Cat-Back Exhaust System with Single Side Exit by aFe®. Exhaust Type: Cat-Back. Exhaust Tubing Material: 409 SS. Main Tubing Diameter: 3". Exhaust System Sound: Aggressive / Loud. Get increased...
      $741.00
    • (0 reviews)
      # 1520802
      Hummer H2 2003, Sport™ 304 SS Cat-Back Exhaust System with Dual Rear Exit by Corsa®. Exhaust Type: Cat-Back. Exhaust Tubing Material: 304 SS. Main Tubing Diameter: 3". Exhaust System Sound: Aggressive / Loud. The patented Reflective...
      $1,129.00 - $1,233.00
    • (0 reviews)
      # 22207378
      Hummer H2 with LEV Standard / with LEV1 Standard 2003, OBDII Catalytic Converter by MagnaFlow®. Emissions: CARB compliant. Converter Configuration: Direct Fit. With Gasket. If your car needs replacement, install one that will get you...
      $513.11 - $532.14
    • (1 review)
      # 1002105414
      Hummer H2 2003, Touring™ Stainless Steel Cat-Back Exhaust System with Split Rear Exit by Borla®. Exhaust Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 2.5" to 2". Exhaust System Sound: Mild / Stock....
      $1,030.99
    • (0 reviews)
      # mpn1110268
      Hummer H2 2003, MagnaFlow Series™ Stainless Steel Cat-Back Exhaust System with Dual Rear Exit by MagnaFlow®. Exhaust Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 2.5". Exhaust System Sound: Moderate....
      $672.70
    • (0 reviews)
      # mpn1110273
      Hummer H2 2003, MagnaFlow Series™ Stainless Steel Cat-Back Exhaust System with Split Rear Exit by MagnaFlow®. Exhaust Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 3". Exhaust System Sound: Moderate....
      $814.68
    • (0 reviews)
      # 3734702
      Hummer H2 2003, Swept Side™ Single Cat-Back Exhaust System with Single Exit by Gibson®. Exhaust Type: Cat-Back. Exhaust System Sound: Aggressive / Loud. Get increased horsepower and torque in the rpm range where you need it most, with...
      $419.75 - $521.81
    • (0 reviews)
      # mpn4489407990
      Hummer H2 2003, Stainless Steel Cat-Back Exhaust System with Dual Rear Exit by Billy Boat Exhaust®. Exhaust Type: Cat-Back. Exhaust Tubing Material: Stainless Steel. Mandrel bent from the highest-grade T-304 stainless steel. Designed,...
      $849.49
    • (0 reviews)
      # mpn358945643
      Hummer H2 2003, SuperMAXX Stainless Steel Natural Long Tube Exhaust Headers by Dynatech®. Primary Tubing Diameter: 1.75". Emissions: Racing Only. Finish: Natural. Header Style: Long Tube. SuperMAXX Stainless Long Tube Headers are an...
      $799.99
    • (0 reviews)
      # mpn4351213861
      Hummer H2 2003, Exhaust Headers by Advance Adapters®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and...
      High quality at an affordable priceExpertly made from premium materials
      $263.82
    • (0 reviews)
      # 221600437
      Hummer H2 2003, Cat4ward Stainless Steel Shorty Exhaust Headers by JBA®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". Emissions: CARB compliant. Header Material: Stainless Steel. Header Style: Short Tube. JBA shorty...
      $469.90 - $611.81
    • (0 reviews)
      # 378677835
      Hummer H2 2003, Roadster Exhaust Headers by Patriot Exhaust®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 3.5". This superior Patriot EXhaust product is just for you. Carefully designed for maximum performance, is will...
      $266.11 - $556.88
    • (0 reviews)
      # 378677814
      Hummer H2 2003, Street Rod Sprint Exhaust Headers by Patriot Exhaust®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 3.5". Emissions: EPA compliant. This superior Patriot EXhaust product is just for you. Carefully designed...
      $264.29 - $512.25
    • (0 reviews)
      # 308602338
      Hummer H2 2003, Steel Short Tube Exhaust Headers by Doug Thorley Headers®. Primary Tubing Diameter: 1.625". Collector Outlet Diameter: 2.5". Emissions: CARB compliant. Header Style: Short Tube. These shortie headers are a fantastic way...
      $489.00 - $519.00
    • (0 reviews)
      # 990429116
      Hummer H2 2003, Header Gasket by AllStar Performance®, 1 Piece. Durable reinforced steel core and graphite composite gaskets remain soft and pliable to conform to header and head surfaces providing an excellent, long lasting seal.
      Precise manufacturing and high-grade materialsExpertly Crafted from the highest grade materials
      $7.59 - $9.49
    • (0 reviews)
      # 380847372
      Hummer H2 2003, Heavy Metal Catalytic Converter by MagnaFlow®. Emissions: EPA compliant. Converter Configuration: Direct Fit. With Gasket. If your car needs replacement, install one that will get you through the smog check. This...
      $395.45 - $414.45
    • (0 reviews)
      # 317023748
      Hummer H2 2003, Heavy Metal Catalytic Converter by MagnaFlow®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter:...
      $111.97
    • (0 reviews)
      # 317023723
      Hummer H2 with LEV Standard / with LEV1 Standard 2003, OBDII Catalytic Converter by MagnaFlow®. Emissions: CARB compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval. Without Air Tube. Without O2 Sensor...
      $201.48
    • (0 reviews)
      # 61588860
      Hummer H2 2003, OEM Grade Catalytic Converter by MagnaFlow®. Emissions: EPA compliant. Converter Configuration: Direct Fit. With Gasket. If your car needs replacement, install one that will get you through the smog check. This converter...
      $454.27 - $473.29
    • (0 reviews)
      # 317023762
      Hummer H2 2003, OEM Grade Catalytic Converter by MagnaFlow®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Oval. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter:...
      $136.20
    • (0 reviews)
      # 61943096
      Hummer H2 2003, SuperMAXX Stainless Steel Intermediate Tubes by Dynatech®. Material: Stainless Steel. SuperMAXX Stainless Intermediate Section is an excellent way to complete your Dynatech Header System. Designed with High-Flow...
      T304 Stainless Steel ConstructionHardware Included
      $399.99 - $599.99
    • (0 reviews)
      # mpn3003713054
      Hummer H2 2003, Stainless Steel Natural Non-Catted Y-Pipe by JBA®. Material: Stainless Steel. BA 409 series stainless steel mid-pipes are the perfect compliment to your JBA Headers or JBA Exhaust system. These systems open up the flow...
      O2 sensor provisionsStandard on EFI headers for proper connection
      $305.63
    • (0 reviews)
      # mpn358582413
      Hummer H2 2003, Aluminum Header Flange Kit by Moroso®. Material: Aluminum. With this quality part backed by a great price, you can enjoy your vehicle so much more than you thought was possible. This Moroso part is specifically...
      High quality at an affordable priceExpertly made from premium materials
      $115.02
    • (0 reviews)
      # 221600441
      Hummer H2 2003, Catalytic Converter Gasket by JBA®. JBA is proud to offer accessories to aid in the fitment of your JBA exhaust product. This product is made of high-quality materials to serve you for years to come. Designed using...
      JBA's premium header flange gaskets are made extra thick from a specially made formulated gasket materialTheir gaskets are rated up to 1100 F
      $9.79
    • (0 reviews)
      # mpn358507470
      Hummer H2 2003, Multi-Layer Steel Exhaust Header Gasket by Cometic Gasket®. Material: Multi-Layer Steel. Exhaust Gaskets are designed for extreme cylinder pressures. MLS Exhaust Manifold Gaskets maintain a torque set and resist...
      Made of High Quality MaterialsBuilt to Last
      $31.61
    • (0 reviews)
      # 652604854
      Hummer H2 2003, HTR Collector Gaskets by Percy's High Performance®. This products is an OEM and Performance company that was built on its founding heritage supported by a tradition of Legendary Quality. Designed utilizing the latest...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $14.16
    • (0 reviews)
      # 314953945
      Hummer H2 2003, Header Locking Bolt Kit by Stage 8®. Stage 8 locking fastener solutions are fail-safe when used and installed as directed. They are removable and reusable and can be visually inspected; if the locking retainer and clip...
      High quality at an affordable priceExpertly made from premium materials
      $20.40 - $59.10
    • (0 reviews)
      # 115273451
      Hummer H2 2003, Replacement Exhaust Kit by Walker®. If you are looking for the ultimate in quality and value, then this superior replacement exhaust kit by Walker is what you need. All its components are designed with precision...
      Mufflers and Resonators Designed for OE equivalent sound and precision fitOE-style louvered tube technology for a premium, factory-like sound
      $64.16 - $268.65
    • (0 reviews)
      # 165483852
      Hummer H2 2003, Replacement Exhaust Kit by AP Exhaust®. Get confidence with this high-standard OE quality purchase which is perfect for those who want to perform a long-lasting exhaust system repair. Made from top-notch materials, this...
      Superior replacement for your worn out exhaust partHelps put your vehicle back to its tip-top shape
      $49.62 - $372.54
    • (0 reviews)
      # 231132703
      Hummer H2 2003, Cast Iron Natural Exhaust Manifold by Dorman®. Emissions: CARB compliant. Finish: Natural. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and...
      High Quality tubular construction protects against warping and/or crackingLeak-resistant for long-lasting performance
      $67.95 - $99.95
    • (0 reviews)
      # 231299744
      Hummer H2 2003, Cast Iron Natural Exhaust Manifold by ATP®. Emissions: EPA compliant. Finish: Natural. ATP Graywerks Exhaust Manifolds are a high quality OE replacement alternative. Each manifold is developed off of the original parts...
      Manufactured to OE design ensuring manifold will line up and flow like the original unitHigh grade metallurgy resists fatigue cracking and breakage
      $63.07 - $87.41
    • (0 reviews)
      # 286255966
      Hummer H2 Engine Family # 3GMXT06.0194 2003, CalCat™ Catalytic Converter by Walker®. Emissions: CARB compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. With 1 Inlet. Without Air Tube. Without O2...
      Constructed to meet your vehicle’s specific emissions requirementsFeatures stainless steel body with aluminized steel pipe and heat shields
      $149.43
    • (0 reviews)
      # 87067204
      Hummer H2 2003, Ultra™ Catalytic Converter and Pipe Assembly by Walker®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Round. With 1 Inlet. With O2 Sensor Port. Walker is an OE...
      Constructed to meet your vehicle’s specific emissions requirementsBody and pipe heat shields made of high quality materials for durability
      $268.65
    • (0 reviews)
      # 85232465
      Hummer H2 2003, Ultra™ Catalytic Converter by Walker®. Emissions: EPA compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Round. With 1 Inlet. Without Air Tube. Without O2 Sensor Port. Catalytic...
      Constructed to meet your vehicle’s specific emissions requirementsFeatures stainless steel body with aluminized steel pipe and heat shields
      $85.92
    • (0 reviews)
      # 286255959
      Hummer H2 Engine Family # 3GMXT06.0194 2003, ECO CARB Undercar Catalytic Converter and Pipe Assembly by Eastern®. Emissions: CARB compliant. Converter Configuration: Direct Fit. With 2 O2 Sensor Ports. If you need to replace your failed...
      Direct OEM replacementConverts harmful engine emissions to less dangerous gases and water vapor
      $232.84 - $250.07
    • (0 reviews)
      # mpn1268788
      Hummer H2 2003, ECO GM Catalytic Converter and Pipe Assembly by Eastern®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Position: Passenger Side. Location: Undercar. With 2 O2 Sensor Ports. Catalytic Converter Overall...
      Direct OEM replacementConverts harmful engine emissions to less dangerous gases and water vapor
      $258.91
    • (0 reviews)
      # mpn1268787
      Hummer H2 2003, ECO II Catalytic Converter and Pipe Assembly by Eastern®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Position: Driver Side. Location: Undercar. With 2 O2 Sensor Ports. Catalytic Outlet Diameter: 2.5"....
      Direct OEM replacementConverts harmful engine emissions to less dangerous gases and water vapor
      $262.91
    • (0 reviews)
      # 100289976
      Hummer H2 2003, Catalytic Converter by Eastern®. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Large Oval. Catalytic Converter Overall Length: 16". Whether your catalytic converter is damaged by road debris or...
      Converts harmful engine emissions to less dangerous gases and water vaporAdvanced design for maximum engine output
      $79.36 - $141.09
    • (0 reviews)
      # 81676410
      Hummer H2 2003, Catalytic Converter and Pipe Assembly by AP Exhaust®. Converter Configuration: Direct Fit. Without Air Tube. With 2 O2 Sensor Ports. The growing concern for the environment means there is a growing need for quality...
      5-year/50,000-mile warranty on converter body25,000-mile warranty on emissions
      $291.47 - $372.54
    • (0 reviews)
      # mpn1145251086
      Hummer H2 2003, Catalytic Converter by AP Exhaust®. Emissions: CARB compliant. Converter Configuration: Universal Fit. Catalytic Converter Body Shape: Large Oval. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter:...
      A multitude of Universal converter bodies provided for maximum coverageProvides professional installer with immediate installation options
      $155.27
    • (0 reviews)
      # mpn4478196579
      Hummer H2 2003, Catalytic Converter by Davico®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Position: Passenger Side. With 2 O2 Sensor Ports. Catalytic Converter Overall Length: 40". This direct-fit catalytic...
      Helps your vehicle emit harmless gasesDirect OEM replacement
      $285.13
    • (0 reviews)
      # mpn1300971244
      Hummer H2 2003, Catalytic Converter and Pipe Assembly by Davico®. Emissions: EPA compliant. Converter Configuration: Direct Fit. Position: Driver Side. With 2 O2 Sensor Ports. Catalytic Converter Overall Length: 50". This direct-fit...
      Helps your vehicle emit harmless gasesDirect OEM replacement
      $273.74
    • (0 reviews)
      # mpn1870628
      Hummer H2 2003, Quiet-Flow™ Stainless Steel Oval Aluminized Exhaust Muffler by Walker®. Muffler Inlet Diameter: 2.5". Muffler Outlet Diameter: 2.625". Muffler Body Length: 24". Muffler Overall Length: 28". Muffler Configuration:...
      Designed for OE equivalent sound and precision fitSpun-locked heads for a proper resistance to backfire
      $77.48
    • (0 reviews)
      # 18126080
      Hummer H2 2003, Aluminized Steel Exhaust Extension Pipe by Walker®. Material: Aluminized Steel. With their extensive selection of accessories and hardware for the exhaust system, Walker will provide you with everything needed to do the...
      Makes installation quick and easyOptimal OE-style fit and quality
      $20.08 - $64.48
    • (0 reviews)
      # mpn1888607
      Hummer H2 2003, Aluminized Steel Exhaust Tailpipe by Walker®. Material: Aluminized Steel. If you want exhaust piping that delivers precise OE-style fit, appearance, and reliability, this part is your number one choice. Every pipe is...
      Designed to directly replace the factory partMade with precision benders and fixture checked
      $64.16
    • (0 reviews)
      # 73597206
      Hummer H2 2003, GM Original Equipment™ Oxygen Sensor by ACDelco®. If your O2 sensor is not functioning properly, you are robbing yourself of performance and costing yourself money at the gas pump. Let ACDelco’s GM OE Oxygen Sensor...
      ACDelco GM OE Oxygen Sensors earn the name ACDelco by being put through a variety of tests, often under extreme and unusual conditions.Detects oxygen content in the exhaust gases.
      $37.02 - $58.46
    • (0 reviews)
      # 485623295
      Hummer H2 2003, Professional™ Oxygen Sensor by ACDelco®. If your O2 Sensor is not functioning properly, you are robbing yourself of performance and costing yourself money at the gas pump. Let ACDelco’s Professional Oxygen Sensors...
      ACDelco Professional Oxygen Sensors earn the name ACDelco by being put through a variety of tests, often under extreme and unusual conditionsCustomers can receive better gas mileage with a properly working oxygen sensor
      $75.03
    • (0 reviews)
      # 81769566
      Hummer H2 2003, Oxygen Sensor by Delphi®. As one of the leading suppliers of oxygen sensor technology since 1978, Delphi planar technology is the result of their OE and aftermarket engineers partnering together to develop the most...
      OE connectors and wire lengths within 3" of OE specificationsResists high temperatures, vibration damage and wire corrosion to protect signal accuracy, and long life
      $39.69 - $57.76
    • (0 reviews)
      # 24161254
      Hummer H2 2003, Premium Oxygen Sensor by Bosch®. A worn-out oxygen sensor can cause engine performance problems and shorten the life of the catalytic converter. Tune-up your vehicle with an Oxygen Sensor from Bosch that is equally...
      Up to 15 % savings in fuel costsReduced CO2 emissions
      $34.44 - $46.85
    • (0 reviews)
      # 24161265
      Hummer H2 2003, Universal Fit Oxygen Sensor by Bosch®. Universal Oxygen Sensors with OE SmartLink are quick and easy to install. Each sensor has enough length of sensor wire to allow maximum replacement of worn harnesses. Properly...
      Patented SmartLink™ connector systemNo special tools required for installation
      $34.02 - $37.85
    • (0 reviews)
      # 21090971
      Hummer H2 2003, Oxygen Sensor by Denso®. Denso's light duty oxygen sensor started to appear on vehicles with the development of fuel injection systems. The basic job of the sensor is to monitor the air fuel mixture under idle, moderate...
      Corrosion-resistant stainless steel constructionPTFE filter blocks efficiency-robbing contaminants
      $40.97 - $45.66
    • (0 reviews)
      # mpn519039
      Hummer H2 2003, Universal Fit Oxygen Sensor by Denso®. Position: Upstream. Denso's light duty oxygen sensor started to appear on vehicles with the development of fuel injection systems. The basic job of the sensor is to monitor the air...
      Corrosion-resistant stainless steel constructionPTFE filter blocks efficiency-robbing contaminants
      $30.77
    • (0 reviews)
      # 22139463
      Hummer H2 2003, Oxygen Sensor by NTK®. Thimble type sensors feature a ceramic element that projects into the exhaust system and becomes electrically conductive at high temperature. The sensor element then sends voltage signals back to...
      Increases vehicle fuel economy and engine performance while decreasing vehicle exhaust emissionsDirect replacement
      $45.54 - $53.05
    • (0 reviews)
      # 22842621
      Hummer H2 2003, Oxygen Sensor by Spectra Premium®. To ensure your vehicle has optimal performance and fuel economy while producing minimal emissions replace a defective O2 sensor with one backed by the aftermarket’s most rigorous...
      Increase vehicle fuel economy and engine performance while decreasing vehicle exhaust emissions100% performance tested to meet vehicle requirements
      $26.74 - $43.85
    • (0 reviews)
      # 906645522
      Hummer H2 2003, Oxygen Sensor by PSI®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...
      Designed for ultra high efficiencyEasy out-of-the-car access for an ancillary wiring
      $65.00
    • (5 reviews)
      # 62541399
      Hummer H2 2003, Exhaust Manifold to Cylinder Head Repair Clamp by Dorman®. Easily repair exhaust leaks without removing broken manifold bolts with Dorman’s Exhaust Manifold to Cylinder Head Repair Clamp. This Manifold Repair Clamp...
      Eliminates the need to remove cylinder head, saving you time and moneyReduces installation time
      $29.95 - $33.95
    • (0 reviews)
      # mpn474125174
      Hummer H2 2003, Extra Heavy Duty Mild Steel Natural Exhaust Clamp by AP Exhaust®. This superior product was carefully designed with key attention to detail and manufactured from high-grade materials to the strict standards of the...
      Made from first-rate materialsEnsures outstanding durability
      $1.73
    • (0 reviews)
      # mpn4483388270
      Hummer H2 2003, Rubber Exhaust Hanger by Genuine®. Material: Rubber. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your...
      High quality at an affordable priceExpertly made from premium materials
      $23.95
    • (0 reviews)
      # mpn4499447149
      Hummer H2 2003, 4 Wire Squre Oxygen Sensor Extension Harness by PSI®. 4 Squre Gray Connector. Extensions are 18" long for use with Gen III LS and Vortec Engines 2003 - up. allows plug-in solution requiring no harness modification. all...
      Designed for ultra high efficiencyEasy out-of-the-car access for an ancillary wiring
      $18.99
    • (0 reviews)
      # mpn888405507
      Hummer H2 2003, GM Original Equipment™ Exhaust Manifold Gasket by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $9.36




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    2003 Hummer H2 Performance Exhaust Systems Reviews

    Average rating:  4  4 - 2 reviews
    3.5 of 5
    It Was To Small
    It was to small had to take it get fitted and cut down.
    CPosted by Charles (Cape Girardeau, MO) / March 13, 2018
    2007 Chevy Avalanche
    Was this review helpful for you? Yes
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