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The 57 Series Generation II air intake, also referred to as an FIPK®, is K&N's ultimate performance product. These performance intakes are designed to increase power by as much as 10%. 57 Series FIPK's are CARB exempt, street legal in all 50 US states, come with a Million Mile Limited Warranty and ...

Airflow Rating     Cotton, Cleanable: Flows 47.8% better than the Stock Intake Dry: Flows 46.7% Better than the Stock Intake Efficiency Rating     Cotton, Cleanable: 99.32% Efficient @ 632 CFM (ISO Coarse Dust) Dry: 99.74% Efficient @ 632 CFM (ISO Coarse Dust) S&B Cold Air Intake...

AEM Intake Systems are designed to produce massive horsepower and torque gains as well as better engine sound when used as a replacement for the factory airbox and air filter. AEM intake systems are designed, tuned, and dyno-tested to fit specific cars and trucks. These kits usually include an overs...

AEM Intake Systems are designed to produce massive horsepower and torque gains as well as better engine sound when used as a replacement for the factory airbox and air filter. AEM intake systems are designed, tuned, and dyno-tested to fit specific cars and trucks. These kits usually include an overs...

Bringing you the next generation of intakes, the Momentum HD sealed air intake system is designed using the most up-to-date engineering tools and techniques to provide you with the perfect blend of power and protection. This intake system is superior in every way. From the one-piece sealed housing...

Passes the test. Again and again.Others build and ship without testing. Not Banks. Our Ram-Air Intakes start out as CAD software prototypes and are put through flow simulations. The design is refined until the simulation shows optimal performance. Then a hardware prototype is made and the design is ...

This Stage 2 cold air intake system produces 12 HP and 28 lbs. x ft. of torque and outflows the factory intake by 42%. Enclosed in a durable 18 gauge, powder-coated heat shield; this air intake system features a massive 6" base x 7" height filter with a 4" flange washable/reusable conical air filter...

The Injen Evolution Air Induction System for your 2001-2004 GM 6.6L Duramax LB7 is a dyno tuned intake system that's designed to enhance air flow for maximum horsepower and torque gains on your truck. Designed using the latest CAD software, the Rotomolded, cross-linked polyethylene construction allo...

These are the latest version direct from Bosch to replace troublesome early LB7 injector.  Don't be fooled by cheap imitations or the promise of a quality "Reman" from other sources, as these are Genuine Bosch injectors. This is a 2001-2004 LB7 Duramax Diesel Bosch Fuel Inj...

ARP stainless steel valve cover bolt kit for LB7 Duramax. Features170,000 PSI of Tensile StrengthStainless SteelSpecsSocket Size: 8mm 12ptThread Size: 1/4-20ARP: 400-7531...

Cruise the highway or hit the track with an MBRP Street Profile exhaust. It’s the perfect mix of aggressive sound when you’re into the throttle without being obnoxious on long drives. ·         Year: 2001-2004 ·    &nbs...

Cruise the highway or hit the track with an MBRP Street Profile exhaust. It’s the perfect mix of aggressive sound when you’re into the throttle without being obnoxious on long drives. ·         Year: 2001-2004 ·    &nbs...

Cruise the highway or hit the track with an MBRP Street Profile exhaust. It’s the perfect mix of aggressive sound when you’re into the throttle without being obnoxious on long drives. ·         Year: 2001-2004 ·    &nbs...

Unleash your vehicle's most aggressive sound with an MBRP Race Profile exhaust. Hear the biggest gains and turn heads every time you hit the gas. Your vehicle will sound like it belongs on a race track. ·         Year: 2001-2004 ·  &nbs...

Unleash your vehicle's most aggressive sound with an MBRP Race Profile exhaust. Hear the biggest gains and turn heads every time you hit the gas. Your vehicle will sound like it belongs on a race track. ·         Year: 2001-2004 ·  &nbs...

Unleash your vehicle's most aggressive sound with an MBRP Race Profile exhaust. Hear the biggest gains and turn heads every time you hit the gas. Your vehicle will sound like it belongs on a race track. ·         Year: 2001-2004 ·  &nbs...

Increase airflow on your 2001-2004 GM 6.6L Duramax LB7 with the HSP LB7 Cold Air Intake. With gains of up to 20HP and 58 lb-ft on average, the HSP Intake System delivers power, efficiency and air flow. The 4" mandrel-bent intake tube provides a free-flowing path for air. The specially designed heat-...

Great Upgrade for Factory Charger- Quicker Spoolup. Includes:-3 1/2" Intake Horn-Stainless Hardware-Gasket-Powder coating-No Tuning Required! 3 1/2" Turbo Intake Horn for 2001-2004 LB7 Duramax. Compatible with factory IHI Turbo or upgraded drop in IHI Turbos and OEM or aftermarket intakes. Great u...

LB7 Duramax 4" Intake Kit for factory turbo.Includes: 4" Intake Dry Air Filter Outerwear's Pre-Filter Cover Silicone Boot T-Bolt Clamps Powder Coating WCFAB part number: WCF100334 Wehrli Custom Powder Coating is housed under the same roof as Wehrli Custom Fabrication. This has Enabled ...

LB7 Stage 2 Intake Kit with turbo inlet horn for factory turbo.Includes: 4" Intake 3-1/2" Intake Horn Outerwear's Pre-Filter Cover Air Filter Cover Silicone Boot T-Bolt Clamps Powder Coating WCFAB part number:WCF100636 Click here for Wehrli powder coat samples Wehrli Custom Powder Coa...

High-Flow Intake Bundle Package for 2001-2004 LB7 Duramax. Save $50 By Buying through this Bundle! Includes: 3" Fabricated Y-Bridge 3" Cold Side Intercooler 3" Hot Side Intercooler Pipe 4" Intake 3-1/2" Intake Horn Dry Air Filter Outerwear's Pre-Filter Cover 3" Turbo Downpipe Silicone Bo...

Alliant Power Reman Common Rail Injector for 2001-2004.5 GM 6.6L Duramax LB7 EnginesAlliant Powers remanufactured injectors are built for engines that demand the most out of their fuel systems in the toughest of conditions.  Alliant Powers PN# AP55502 is the technicians choice when you want to ...

V8 6.6L (DIESEL); Silverado 3500; Crew Cab/ Long Bed (96in. Bed) Dually4.0in. Cat-Back; 5.0in. Double Wall Polished Stainless Tip; SINGLE PASSENGER SIDE REAR EXIT Material: 100% Stainless SteelTubing O.D. Size: 4in.System Type: Cat-Back TIP O.D. Size: 5in.TIP Quantity: 1 Single/Dual: SINGLE Exi...

Physical fitment. Why consider a cheap, ill-fitting aluminized exhaust? Banks 4” Monster Exhaust is made of rugged, long-lasting 100% stainless steel. It fits better than the competition, because Monster Exhaust utilizes the factory hangers and maintains proper clearance to all under-vehicle comp...

Features: *Increased Fuel Economy *Lower EGTs *Mandrel Bent Tubing for Maximum Flow *Direct Fit *Increased Horsepower and Torque *Agressive Sound *Better Throttle Response *Easy Bolt-On Kits *Utilizes OEM Hangers *1-Year Limited Warranty on Aluminized kits *6-Year Limited Warranty on Stainless Stee...

   **This Kit Does Not Include Muffler** Features: *Increased Fuel Economy *Lower EGTs *Mandrel Bent Tubing for Maximum Flow *Direct Fit *Increased Horsepower and Torque *Agressive Sound *Better Throttle Response *Easy Bolt-On Kits *Utilizes OEM Hangers *1-Year Limited Warranty on Aluminized ki...

Backordered with No ETA  **Updated on 10/27/2023**Features: *Increased Fuel Economy *Lower EGTs *Mandrel Bent Tubing for Maximum Flow *Direct Fit *Increased Horsepower and Torque *Agressive Sound *Better Throttle Response *Easy Bolt-On Kits *Utilizes OEM Hangers *1-Year Limited Warranty on ...

  **This Kit Does Not Include Muffler**Features: *Increased Fuel Economy *Lower EGTs *Mandrel Bent Tubing for Maximum Flow *Direct Fit *Increased Horsepower and Torque *Agressive Sound *Better Throttle Response *Easy Bolt-On Kits *Utilizes OEM Hangers *1-Year Limited Warranty on Aluminiz...

Fits, GM Duramax Diesel 2001-2005 6.6L 2500/3500. For, Extended Cab, Long/Short box, Dually. Exclude Suburban. With 4 Bolt Converter Flange and Gasket. 4" Mandrel bent tubing for maximum flow Lower Exhaust Gas TemperaturesMore Pulling PowerUtilizes OEM HangersIncreased Horsepower and Torque Eas...

Fits, GM Duramax Diesel 2001-2005 6.6L 2500/3500. For, Extended Cab, Long/Short box, Dually. Exclude Suburban. With 4 Bolt Converter Flange and Gasket. 4" Mandrel bent tubing for maximum flow Lower Exhaust Gas TemperaturesMore Pulling PowerUtilizes OEM HangersIncreased Horsepower and Torque Eas...

Featuring a factory construction, the Mahle piston (standard, left bank) is an OEM replacement to your 2001-2005 GM 6.6L Duramax LB7/LLY. Each Mahle piston features a lightweight and expansion controlled design that maintains an OEM performance.FEATURES:LightweightQuality ConstructionApplication Not...

Featuring a factory construction, the Mahle Piston (Standard, Right Bank) is an OEM replacement to your 2001-2005 GM 6.6L Duramax LB7/LLY. Each Mahle piston features a lightweight and expansion controlled design that maintains an OEM performance.FEATURES:LightweightQuality ConstructionApplication No...

MBRP 2001-2005 6.6L Duramax Aluminized 4" Exhaust System, Cat/4 Bolt flange Back Aluminized Installer Series, four-bolt flange back. Includes 4 Inch Inlet, 5 Inch Outlet Polished Stainless tip! The Duramax has a refined toughness to it. MBRP Inc. Has left the refined part to General Motors, and ad...

Banks' new Monster Sport Exhaust is one cool cat-back system! And its low price? That's way cool. The system slashes backpressure, increases exhaust flow, improves fuel economy and delivers extra power to your rear wheels. Exhaust tip optional. 4" constant-diameter cat-back exhaust system Virtua...

Fits, GM Duramax Diesel 2001-2007 6.6L 2500/3500. For, Extended Cab, Long/Short box, Dually. 4" Mandrel bent tubing for maximum flow Lower Exhaust Gas TemperaturesMore Pulling PowerUtilizes OEM HangersIncreased Horsepower and Torque Easy Bolt-on Kits, "Everything you need"   Flo Pro part num...

Fits, GM Duramax Diesel 2001-2007 6.6L 2500/3500. For, Extended Cab, Long/Short box, Dually. 4" Mandrel bent tubing for maximum flow Lower Exhaust Gas TemperaturesMore Pulling PowerUtilizes OEM HangersIncreased Horsepower and Torque Easy Bolt-on Kits, "Everything you need" Flo Pro part number:...

Bosch New Common Rail Injector for 2004-2005 GM 6.6L Duramax LLY EnginesWhen your hard working LLY Duramax engine needs new injectors, it deserves the OE injector to be put back into the engine to ensure a long life ahead of it.  Bosch was the original OE supplier for this injector to GM when i...

04.5-05 6.6L LLY Duramax REMAN 120% Modified CP3 Industrial Injection Reman pumps are a little different than others in the fact that we only use brand new Bosch OEM genuine parts inside our pumps. Everything internally as well as externally besides the case of the pumps is replaced, tested and...

Passes the test. Again and again.Others build and ship without testing. Not Banks. Our Ram-Air Intakes start out as CAD software prototypes and are put through flow simulations. The design is refined until the simulation shows optimal performance. Then a hardware prototype is made and the design is ...

04.5-05 6.6L LLY Duramax Stock Replacement Bosch Reman InjectorDon't be fooled by knock-offs, cheap imitations, or remans these are Genuine Bosch injectors with a 12 month, unlimited mile warranty!This is a 2004-2005 LLY Duramax Diesel Bosch Fuel Injector, that has been remanufactured by the same co...

DFC engines may take up to 14 weeks to ship. Please contact us to verify lead times if you are in a hurry, before purchasing.  Built for work trucks, daily drivers and the diesel enthusiast in mind these engines are a vast improvement from stock as they contain important upgrades to common...

DFC engines may take up to 14 weeks to ship. Please contact us to verify lead times if you are in a hurry, before purchasing.  The DFC Diesel Tow/Haul Series engine comes standard with all the upgrades found in the Street Series model as well as several enhancements to ...

04.5-05 6.6L LLY Duramax REMAN 85% Over CP3 Industrial Injection Reman pumps are a little different than others in the fact that we only use brand new Bosch OEM genuine parts inside our pumps. Everything internally as well as externally besides the case of the pumps is replaced, tested and cali...

Outflow the factory air intake system in your 2004.5-2005 GM 6.6L Duramax LLY with the S&B Filters 75-5102/75-5102D Cold Air Intake Kit with Cleanable Filter or Dry Filter. S&B Air Intake systems are engineered to give you an increase in airflow, providing you with a boost in horsepower, torque, and...

WCFab 4” Intake kits are designed to work with the factory turbocharger or upgraded “drop-in” style turbochargers. Using a high flow AFE dry type air filter for more air flow and better filtration over the factory unit this intake kit will provide more horsepower and torque. Available in many...

WCFab 4” Stage 2 Intake kits are designed to work with the factory turbocharger or upgraded “drop-in” style turbochargers. Using a high flow AFE dry type air filter for more air flow and better filtration over the factory unit this intake kit will provide more horsepower and torque. Available ...

The Injen Evolution Air Induction System for your 2004.5-2006 GM 6.6L Duramax LLY is a dyno tuned intake system that's designed to enhance air flow for maximum horsepower and torque gains on your truck. Designed using the latest CAD software, the Rotomolded, cross-linked polyethylene construction al...