2003 Chevy Avalanche Performance Fuel Systems

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    • (1 review)
      # 325182288
      Chevy Avalanche 2003, Powr-Flo™ Throttle Body by JET®. The JET Powr-Flo Throttle Body is a direct replacement for the factory unit. It can be used to replace a worn out throttle body or to upgrade the existing throttle body. JET...
      Modified air inlet to improve air flow and Throttle responseUnique Design increases air velocity to the intake manifold
      $369.71
    • (0 reviews)
      # 801754518
      Chevy Avalanche 5.3L 2003, EZ-EFI 2.0™ 8-Stack Induction System by Inglese®. The EZ-EFI 2.0™ Induction Systems may look like classic Weber induction, but these technically advanced systems deliver increased performance, cold starts...
      FAST™ EZ-EFI 2.0™ self learning EFI tunes itself as you drive; no laptop requiredRequires an EFI-capable (40+ psi) fuel system; Otherwise a full carb-to-EFI conversion
      $5,691.68 - $5,927.52
    • (3 reviews)
      # 1023267652
      Chevy Avalanche 2003, OEM In-Line Fuel Catalyst by Fitch® Fuel Catalyst. Get improved performance and reduced emissions with the Fitch Fuel Catalyst! Unlike expensive additives that must be continually replenished, you purchase this...
      Increases fuel economyIncreases horsepower and torque for improved performance
      $215.55 - $271.65
    • (0 reviews)
      # 434267
      Chevy Avalanche 2003, PowerAid™ Throttle Body Spacer by AIRAID®. The POWERAID Throttle Body Spacer is designed to enhance off-idle torque from 800 rpm to approximately 3,000 rpm. The spacer utilizes it’s unique, patented Helix Bore...
      Enhances fuel atomization, which improves combustion and engine efficiencyIncreases low end torque and fuel economy
      $128.47 - $163.43
    • (1 review)
      # mpn1058086
      Chevy Avalanche 5.3L 2003, Vortice Throttle Body Spacer by Volant®. In the quest for more air, the throttle body is the last assembly that can be modified before air enters the engine. Vortice throttle body spacers employ a unique set...
      Glass-filled nylon constructionO-ring, gasket and hardware included
      $33.22
    • (0 reviews)
      # mpn2131538
      Chevy Avalanche 5.3L 2003, Helix Power Tower Plus Throttle Body Spacer by Taylor Cable®. Street and Performance Electronics, the first company to develop the throttle body spacer has achieved a design breakthrough and developed a new...
      Creates better engine cylinder filling and can be used with any grade of fuel for more power and economyChambers and channels specially designed to improve efficiency and air velocity performance
      $99.80
    • (0 reviews)
      # 598328964
      Chevy Avalanche 5.3L Chevy small block Gen III/IV (LS-based) 2003, Big Mouth LT™ Throttle Body by Fast®. Big Mouth LT Throttle Bodies™ from FAST™ are a perfect choice for a variety of GM LS applications. Features black-wrinkle...
      Black-wrinkle powder coating & all of the same functions as billet throttle bodiesWorks excellently with LSX™ & LSXR™ intake manifolds as well as OEM intake manifolds
      $364.35 - $471.69
    • (0 reviews)
      # 955036758
      Chevy Avalanche 5.3L Gas Small Block Chevy Engine 2003, Velocity 4-Bolt Throttle Body by TSP®.
      Designed for ultra high efficiencyProvides better performance
      $142.35
    • (0 reviews)
      # 906645287
      Chevy Avalanche 5.3L Gas 2003, Edelbrock DBC Throttle Body by PSI®.
      Designed for ultra high efficiencyEasy out-of-the-car access for an ancillary wiring
      $390.00 - $500.00
    • (2 reviews)
      # mpn753352156
      Chevy Avalanche 5.3L Small Block 2003, Mechanical Fuel Pump by BTP®. Designed to replace and outperform OEM equipment. Chrome plated aluminum. Free Flow Rate: 80 GPM. Inlet Size: 1/4" NPT. Outlet Size: 1/4" NPT. Max Pressure: 6 PSI....
      Designed to provide maximum performance of your fuel systemMade from premium materials
      $41.22
    • (0 reviews)
      # 990389285
      Chevy Avalanche 2003, Sportsman 2-Valve Fuel Pump by AllStar Performance®. Pumps with aluminum housings have 1/4"NPT inlet/outlet fittings, heavy duty diaphrams, anti-floatsprings, and "clockable" lower base for rotation of inlet and...
      Precise manufacturing and high-grade materialsExpertly Crafted from the highest grade materials
      $49.99
    • (0 reviews)
      # mpn4499447055
      Chevy Avalanche 5.3L Gas 2003, External Fuel Pump Kit by PSI®. This kit is designed for LS engines that have a single fuel inlet fitting. PSI 255-LPH externally mounted fuel pump kit is ideal for all Gen III and Gen IV LS and Vortec...
      Designed for ultra high efficiencyEasy out-of-the-car access for an ancillary wiring
      $495.00
    • (0 reviews)
      # 906648125
      Chevy Avalanche 5.3L Gas 2003, Walbro 255-LPH Fuel Pump by PSI®.
      Designed for ultra high efficiencyEasy out-of-the-car access for an ancillary wiring
      $140.00 - $150.00
    • (0 reviews)
      # 191386245
      Chevy Avalanche 5.3L 24x Crank Reluctor 2003, Terminator™ LS MPFI Kit by Holley®. 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...
      Kit includes everything you need to control your stock or mild LSBosch wideband oxygen sensor included
      $1,900.95 - $2,956.95
    • (0 reviews)
      # 191386223
      Chevy Avalanche 5.3L Gas 24x Crank Reluctor 2003, Terminator™ TBI Kit by Holley®. 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...
      Plug and play with factory sensors and coil sub-harnessesBosch wideband oxygen sensor included
      $2,217.95 - $3,009.95
    • (0 reviews)
      # 714879932
      Chevy Avalanche 8.1L Chevy Big Block 2003, Go Port EFI Fuel Injection Kit by FiTech®. 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....
      High quality at an affordable priceExpertly made from premium materials
      $1,909.68 - $2,122.45
    • (0 reviews)
      # 801752825
      Chevy Avalanche 5.3L 2003, 8-Stack Induction System by Inglese®. Unassembled, Without Electronics. The Induction Systems may look like classic Weber induction, but these technically advanced systems deliver increased performance, cold...
      User can choose a camshaft from wider selection than Weber carburetors allowLow-profile fuel rails sit between throttle bodies for excellent driver visibility
      $3,149.53 - $3,822.42
    • (0 reviews)
      # 415885981
      Chevy Avalanche Base / Z71 5.3L 2003, EZ-EFI® Engine Kit by Fast®. 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
      $1,451.16 - $1,892.06
    • (0 reviews)
      # 415892161
      Chevy Avalanche Base / Z71 5.3L 2003, EZ-EFI® Engine and Manifold Kit with EZ-TCU™ by Fast®. For a complete powertrain control package, the Engine & Manifold Kit with EZ-TCU™ offers the most advanced self tuning engine management...
      Provides GM LS Applications with the Easiest, Most Advanced Self-Tuning EFI AvailableEasy Control of Electronic GM Overdrive Transmission Shift Points, Firmness, & Speed
      $4,561.63 - $4,705.94
    • (0 reviews)
      # mpn358496003
      Chevy Avalanche 2003, EFI Fuel Rail Kit by Holley®. 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
      $152.95
    • (0 reviews)
      # mpn4460893994
      Chevy Avalanche 5.3L Chevy Small Block Gen III/IV (LS-based engines) With Edelbrock Pro-Flo XT Fuel Rail Style 2003, EFI Fuel Rail Kit by Edelbrock®. Designed utilizing the latest technology, this product by Edelbrock features premium...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $174.95
    • (0 reviews)
      # mpn2528257
      Chevy Avalanche 5.3L Chevy Small Block Gen III/IV (LS-based engines) With Victor EFI Fuel Rail Style 2003, Victor Jr. EFI Fuel Rail Kit by Edelbrock®. For Standard Injectors with Stands. Designed utilizing the latest technology, this...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $129.95
    • (0 reviews)
      # mpn359110073
      Chevy Avalanche 2003, 4150 4 BBL Gasoline Carbureted Nitrous Plate Wet System by Nitrous Express®. The conventional system is the perfect entry level nitrous system for the budget minded sportsman racer. These systems feature the most...
      Holley 4150 Carb Spray Plate50, 100, 150, 200, 250, 300 WHP
      $686.62
    • (0 reviews)
      # mpn4476942125
      Chevy Avalanche 2003, Drive by Wire Wet Nitrous Kit by NOS®. A great complement to NOS's cutting-edge nitrous kits, the 05134NOS is great for vehicles where anNOS application-specific kit is not available. Designed to work on sequential...
      Exclusive NOS "Soft-Plume" Fogger nozzle finely atomizes the fuel for superior nitrous and fuel distributionIncludes the world-famous NOS 10 lb "blue bottle"
      $855.95
    • (0 reviews)
      # mpn1976765
      Chevy Avalanche 5.3L Gas 2003, Wet Nitrous System by ZEX®. Safely add 75-125 horsepower to 1999 and newer Vortec V8-powered Chevy Silverado trucks. This nitrous kit was specifically designed to fit on Chevrolet's 4.8, 5.3 and 6.0L...
      Fully adjustable from 55-125 HP with supplied tuning jets; Perfect for mild to wild performanceA complete wet nitrous system; Everything is included for a safe, proper installation
      $629.23
    • (1 review)
      # 525517775
      Chevy Avalanche 2003, 102 mm Plate Nitrous System by Nitrous Outlet®. This system comes out of the box with everything you need to spray 200HP, but can spray up to 400HP with additional jetting. Superior Atomization. This injection...
      Flow Up To 400 HPAnodized Billet Aluminum Nitrous Plate
      $710.55 - $865.61
    • (0 reviews)
      # 524794488
      Chevy Avalanche 2003, Dedicated EFI Fuel System by Nitrous Outlet®. 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...
      Custom Built1 Gallon Fuel Cell
      $812.07 - $1,252.52
    • (1 review)
      # 538876815
      Chevy Avalanche 2003, Fuel Filter by K&N®. K&N Performance Fuel Filters are built for high flow rates and capacity while they provide outstanding filtration. They have a high strength carbon steel housing and a high performance rolled...
      Superior ConstructionLow Restriction
      $11.19 - $11.75
    • (0 reviews)
      # 370906556
      Chevy Avalanche 2003, CM EFI In-Line Fuel Filter by Canton Racing®. This inline filter is for GM, Jaguar and Land Rover EFI with 16 mm female inlet and outlet ports, 4" long and comes with our 2-5/8" long 1 micron fuel element. CM EFI...
      High quality at an affordable priceExpertly made from premium materials
      $124.00
    • (0 reviews)
      # 261926716
      Chevy Avalanche 2003, Powr-Flo™ Throttle Body Spacer by JET®. JET Performance Powr-Flo Throttle Body Spacers were designed using the latest aerospace technology along with JET's 35 plus years of engineering fuel systems for some of...
      Increased Mid-Range Horsepower And TorqueImproved Throttle Response/Increased Fuel Economy
      $100.49 - $114.74
    • (1 review)
      # mpn664022
      Chevy Avalanche GMT800 With California Emissions 2003, Silver Bullet Throttle Body Spacer by aFe®. What is inexpensive, takes only a few minutes to install, and results in more power and improved throttle response? The aFe Silver...
      Improves performanceImproves fuel economy
      $109.25
    • (0 reviews)
      # mpn1345604
      Chevy Avalanche 5.3L Gas With Single Port 2003, Power Plate Throttle Body Spacer by Spectre Performance®. Rooted in racing, Spectre Performance designs and builds every product with the same goal in mind - the best performance in the...
      High-tech engine parts for the most power and best performanceThe finest exterior and interior parts for superior appearance and functionality
      $78.29
    • (0 reviews)
      # mpn2576602119
      Chevy Avalanche 8.1L 2003, Smooth-Bore MPFI Spacer by Trans-Dapt®. 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...
      Built to match your exact requirementsHigh quality you can rely on
      $49.49
    • (0 reviews)
      # mpn2576602115
      Chevy Avalanche 8.1L 2003, Torque Curve MPFI Spacer by Trans-Dapt®. 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...
      Built to match your exact requirementsHigh quality you can rely on
      $53.99
    • (0 reviews)
      # mpn4513229276
      Chevy Avalanche 8.1L 2003, Torque-Curve™ Billet Aluminum Throttle Body Spacer by Hamburger's®. Made in the USA. Billet Aluminum 6061-T6. Thickness: 1". This top-grade product is expertly made in compliance with stringent industry...
      Will help get the most out of your vehicleDesigned with utmost precision for perfection
      $86.43
    • (0 reviews)
      # 98556014
      Chevy Avalanche 5.3L 2003, Fuel Pump Pushrod by Crane Cams®. High-performance engine builders and street tuners who crave for maximum performance out of their vehicle, choose these top-grade performance products painstakingly designed...
      Designed to unlock more performance out of your vehicleBump up engine power to the next level
      $15.55
    • (0 reviews)
      # 1055173306
      Chevy Avalanche 5.3L Gas With Small Block Chevy Engines 2003, Billet Aluminum Fuel Pump Block-Off Plate by AllStar Performance®. CNC-machined billet aluminum plates cover the mechanical pump opening in the engine block and include a...
      Precise manufacturing and high-grade materialsExpertly Crafted from the highest grade materials
      +1
      $16.99
    • (0 reviews)
      # mpn4513189256
      Chevy Avalanche 8.1L 2003, Fuel Pump Installation Kit by Racetronix®. 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....
      Expertly Crafted from the highest grade materialsMade to guarantee exceptional reliability
      $17.50
    • (0 reviews)
      # mpn1973005
      Chevy Avalanche 5.3L Gas 2003, LS Series Perimeter Plate Conversion Kit by ZEX®. Typical spray bar nitrous plates are built on 30 year old technology and suffer from design compromises that can result in less than optimal performance...
      Improved perimeter injection results in even distribution of fuel & nitrous for max power & safetyCreates a low pressure point in the intake plenum for increased engine airflow
      $368.05
    • (0 reviews)
      # mpn4499447053
      Chevy Avalanche 2003, Corvette Style Fuel Filter/Pressure Regulator by PSI®. This filter/pressure regulator allows perfect fuel pressure for any LS or Vortec conversion. Simply plumb your fuel supply line, fuel return line and a single...
      Designed for ultra high efficiencyEasy out-of-the-car access for an ancillary wiring
      $60.00
    • (0 reviews)
      # mpn4484058090
      Chevy Avalanche 5.3L Gas Small Block Chevy Engine 2003, 4-Bolt Throttle Cable Bracket by TSP®. Throttle cable bracket is the ideal compliment to drive-by-cable throttle bodies. It's been designed to work with TSP 92 mm and 102 mm...
      Designed for ultra high efficiencyProvides better performance
      $19.63
    • (0 reviews)
      # mpn4499447056
      Chevy Avalanche 2003, Conversion Throttle Cable by PSI®. Lokar Braided Steel. This cable will allow for a seamless attachment of the LS or Vortec throttle body to most GM/Ford/Chrysler Muscle Car Pedals.
      Designed for ultra high efficiencyEasy out-of-the-car access for an ancillary wiring
      $80.00
    • (0 reviews)
      # mpn4483429478
      Chevy Avalanche 2003, Diesel Dual Fueler Controller Control Module by PPE®. 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...
      Thoughtfully designed to match your diesel engine needsMade to help enhance the performance of your vehicle
      $539.99
    • (0 reviews)
      # 1064200240
      Chevy Avalanche 5.3L Gas With Small Block Chevy Engines 2003, Fuel Pump Gaskets by AllStar Performance®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design...
      Precise manufacturing and high-grade materialsExpertly Crafted from the highest grade materials
      $1.79 - $15.99
    • (0 reviews)
      # mpn1589831869
      Chevy Avalanche 2003, XFI® Ignition Adapter Harnesses by Fast®. 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
      $39.93
    • (0 reviews)
      # mpn1589831868
      Chevy Avalanche 2003, XFI® Ignition Connector Kit by Fast®. 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...
      High quality at an affordable priceExpertly made from premium materials
      $16.79
    • (0 reviews)
      # 524788166
      Chevy Avalanche 2003, Switch Panel by Nitrous Outlet®. This product is made of high-quality materials to sere 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
      $90.47
    • (0 reviews)
      # mpn2527423
      Chevy Avalanche 5.3L Chevy small block Gen III/IV (LS-based) Edelbrock Pro-Flo XT EFI 2003, Replacement Throttle Body Flange Gasket by Edelbrock®. Designed utilizing the latest technology, this product by Edelbrock features premium...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $13.95
    • (0 reviews)
      # mpn3526362675
      Chevy Avalanche 5.3L LS1 2003, Throttle Body Gasket by Cometic Gasket®. 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...
      High quality at an affordable priceExpertly made from premium materials
      $10.77
    • (0 reviews)
      # mpn359117972
      Chevy Avalanche 5.3L 2003, Gen III EFI Manual Throttle Chassis Harness by Painless Performance®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...
      High quality at an affordable priceExpertly made from premium materials
      $1,727.73
    • (0 reviews)
      # 714850059
      Chevy Avalanche 5.3L 2003, Gen III Mechanical TB Harness by Painless Performance®. 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...
      High quality at an affordable priceExpertly made from premium materials
      $803.57 - $822.55
    • (0 reviews)
      # mpn359117961
      Chevy Avalanche 5.3L 2003, Gen III Throttle by Wire Standart Length Harness by Painless Performance®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with...
      High quality at an affordable priceExpertly made from premium materials
      $1,118.81
    • (0 reviews)
      # mpn4499447058
      Chevy Avalanche 2003, EV1 To EV6 Fuel Injector Adapter Harness 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....
      Designed for ultra high efficiencyEasy out-of-the-car access for an ancillary wiring
      $85.00
    • (0 reviews)
      # mpn3088168874
      Chevy Avalanche 2003, 78 mm Plate Nitrous System Hard Line Kit by Nitrous Outlet®. 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...
      Pre-Bent Hard Lines3/16" Stainless Tubing
      $69.56
    • (0 reviews)
      # 524755530
      Chevy Avalanche 2003, Solenoid Bracket by Nitrous Outlet®. Nitrous Outlet vehicle specific solenoid brackets are custom made place the solenoids in the most ideal location in the engine compartment making your nitrous install clean,...
      High quality at an affordable priceExpertly made from premium materials
      $85.31
    • (0 reviews)
      # 784017168
      Universal EZ-EFI 2.0™ 8-Stack Induction System by Inglese®. 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...
      Cast manifold is specific to BBC applicationsFuel rails are engineered to not interfere with distributor cap
      $6,451.25
    • (0 reviews)
      # 801751130
      Universal 8-Stack Induction System by Inglese®. Unassembled, Without Electronics. 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...
      Cast manifold is specific to BBC applicationsFuel rails are engineered to not interfere with distributor cap
      $4,718.06
    • (0 reviews)
      # mpn2894295534
      Universal Gas Treatment with Octane Boost by RBP®. Volume: 16 oz. Treats 500 Gallons. This additive Compensates for the variances in quality of different fuels (including biodiesel) and the deficiencies of today’s Ultra Low Sulfur...
      Total Fuel System CleanerLubricity Enhancer
      $34.50
    • (0 reviews)
      # mpn2894295936
      Universal High Performance Diesel Fuel Additive Enhancer with Cetane by RBP®. Volume: 16 oz. Treats 500 Gallons. This additive Compensates for the variances in quality of different fuels (including biodiesel) and the deficiencies of...
      Total Fuel System CleanerLubricity Enhancer
      $29.50
    • (0 reviews)
      # mpn2894295535
      Universal Professional Grade by RBP®. Volume: 16 oz. Treats 250 Gallons. Completely eliminates water. This additive Compensates for the variances in quality of different fuels (including biodiesel) and the deficiencies of today’s...
      Total Fuel System CleanerLubricity Enhancer
      $34.50




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      What Special Tools Are Available For Fuel...
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      The Top 4 Reasons to Install a Performance...
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      November 06, 2014
      How To Replace An In-Tank Fuel Sending Unit
      A Fuel tank sending unit is a term for the mechanical assembly inside your fuel tank which measures the level of liquid in the tank, then reports its findings to the...
      by Timothy Zahl
    • Replacement Fuel System Parts
      August 03, 2014
      How To Replace Fuel Injectors
      Fuel injectors spray fuel directly into your engine’s cylinders during the intake stroke when a piston moves down to allow air and fuel to fill the cylinder chamber....
      by Michael Grayen

    2003 Chevy Avalanche Models
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