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LB7 Duramax Parts

Parts for the LB7 Duramax (2001 to 2004).

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  • Exergy 6.6L 2000 Bar (29000 PSI) Pressure Relief Valve (M16x1.5) | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $280.00 - Original price $280.00
    Original price
    $280.00
    $280.00 - $280.00
    Current price $280.00

    An Exergy 2000 bar pressure relief valve for the fuel rail on the LB7 Duramax. A replacement for the relief valve on the fuel rail, rated at 2,000 ...

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    Original price $280.00 - Original price $280.00
    Original price
    $280.00
    $280.00 - $280.00
    Current price $280.00
  • Exergy 6.6L 2400 Bar (34800 PSI) Pressure Relief Valve (M16x1.5) *RACE* | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $320.00 - Original price $320.00
    Original price
    $320.00
    $320.00 - $320.00
    Current price $320.00

    An Exergy 2400 bar pressure relief valve for the fuel rail on the LB7 Duramax. A replacement for the relief valve on the fuel rail, rated at 2,400 ...

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    Original price $320.00 - Original price $320.00
    Original price
    $320.00
    $320.00 - $320.00
    Current price $320.00
  • Exergy 6.6L 1800 Bar (26000 PSI) Pressure Relief Valve (M16x1.5) | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $240.00 - Original price $240.00
    Original price
    $240.00
    $240.00 - $240.00
    Current price $240.00

    An Exergy 1800 bar pressure relief valve for the fuel rail on the LB7 Duramax. A replacement for the relief valve on the fuel rail, rated at 1,800 ...

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    Original price $240.00 - Original price $240.00
    Original price
    $240.00
    $240.00 - $240.00
    Current price $240.00
  • Exergy 6.6L Seal Kit (O Ring & Copper Gasket), Set of 8 | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $64.00 - Original price $64.00
    Original price
    $64.00
    $64.00 - $64.00
    Current price $64.00

    An Exergy injector seal kit for the LB7 Duramax. New O rings and copper gaskets for an injector job. Exergy recommends new seals any time the injec...

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    Original price $64.00 - Original price $64.00
    Original price
    $64.00
    $64.00 - $64.00
    Current price $64.00
  • Exergy 6.6L Injector Line Set (Per Side) | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $396.00 - Original price $396.00
    Original price
    $396.00
    $396.00 - $396.00
    Current price $396.00

    Exergy 6.6L LB7 Duramax Injector Line Set (Per Side). An Exergy fuel system part. Fits: 2001 to 2004 Chevy Silverado and GMC Sierra 2500HD and 35...

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    Original price $396.00 - Original price $396.00
    Original price
    $396.00
    $396.00 - $396.00
    Current price $396.00
  • Exergy 14mm Stroker CP3 Pump, Race Series | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $3,200.00 - Original price $3,200.00
    Original price
    $3,200.00
    $3,200.00 - $3,200.00
    Current price $3,200.00

    The Exergy Race Series 14mm Stroker CP3 is one of the biggest single pumps you can put on an LB7 Duramax. Exergy says it easily supports 1,200 hors...

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    Original price $3,200.00 - Original price $3,200.00
    Original price
    $3,200.00
    $3,200.00 - $3,200.00
    Current price $3,200.00
  • Exergy Reman 500% Over Injectors with Internal Modification, Set of 8 | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $7,448.00 - Original price $7,448.00
    Original price
    $7,448.00
    $7,448.00 - $7,448.00
    Current price $7,448.00

    A set of 8 Bosch remanufactured Exergy injectors for the LB7 Duramax, flowing 500% over stock. Exergy builds this size for people competing at the ...

    View full details
    Original price $7,448.00 - Original price $7,448.00
    Original price
    $7,448.00
    $7,448.00 - $7,448.00
    Current price $7,448.00
  • Exergy Reman 250% Over Injectors, Set of 8 | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $6,592.00 - Original price $6,592.00
    Original price
    $6,592.00
    $6,592.00 - $6,592.00
    Current price $6,592.00

    A set of 8 Bosch remanufactured Exergy injectors for the LB7 Duramax, flowing 250% over stock. It is for a truck that already makes more power and ...

    View full details
    Original price $6,592.00 - Original price $6,592.00
    Original price
    $6,592.00
    $6,592.00 - $6,592.00
    Current price $6,592.00
  • Exergy Reman 300% Over Injectors with Internal Modification, Set of 8 | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $7,016.00 - Original price $7,016.00
    Original price
    $7,016.00
    $7,016.00 - $7,016.00
    Current price $7,016.00

    A set of 8 Bosch remanufactured Exergy injectors for the LB7 Duramax, flowing 300% over stock. Exergy builds this size for people competing at the ...

    View full details
    Original price $7,016.00 - Original price $7,016.00
    Original price
    $7,016.00
    $7,016.00 - $7,016.00
    Current price $7,016.00
  • Exergy Reman 400% Over Injectors with Internal Modification, Set of 8 | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $7,192.00 - Original price $7,192.00
    Original price
    $7,192.00
    $7,192.00 - $7,192.00
    Current price $7,192.00

    A set of 8 Bosch remanufactured Exergy injectors for the LB7 Duramax, flowing 400% over stock. Exergy builds this size for people competing at the ...

    View full details
    Original price $7,192.00 - Original price $7,192.00
    Original price
    $7,192.00
    $7,192.00 - $7,192.00
    Current price $7,192.00
  • Exergy Reman 200% Over Injectors, Set of 8 | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $6,160.00 - Original price $6,160.00
    Original price
    $6,160.00
    $6,160.00 - $6,160.00
    Current price $6,160.00

    A set of 8 Bosch remanufactured Exergy injectors for the LB7 Duramax, flowing 200% over stock. It is for a truck that already makes more power and ...

    View full details
    Original price $6,160.00 - Original price $6,160.00
    Original price
    $6,160.00
    $6,160.00 - $6,160.00
    Current price $6,160.00
  • Exergy Reman 60% Over SAC Injectors, Set of 8 | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $4,192.00 - Original price $4,192.00
    Original price
    $4,192.00
    $4,192.00 - $4,192.00
    Current price $4,192.00

    A set of 8 Bosch remanufactured Exergy injectors for the LB7 Duramax, flowing 60% over stock. It is for the owner who wants more power without givi...

    View full details
    Original price $4,192.00 - Original price $4,192.00
    Original price
    $4,192.00
    $4,192.00 - $4,192.00
    Current price $4,192.00
  • Exergy Reman 100% Over SAC Injectors, Set of 8 | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $4,752.00 - Original price $4,752.00
    Original price
    $4,752.00
    $4,752.00 - $4,752.00
    Current price $4,752.00

    A set of 8 Bosch remanufactured Exergy injectors for the LB7 Duramax, flowing 100% over stock. It is for the owner who wants more power without giv...

    View full details
    Original price $4,752.00 - Original price $4,752.00
    Original price
    $4,752.00
    $4,752.00 - $4,752.00
    Current price $4,752.00
  • Exergy Reman 45% Over SAC Injectors, Set of 8 | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $3,896.00 - Original price $3,896.00
    Original price
    $3,896.00
    $3,896.00 - $3,896.00
    Current price $3,896.00

    A set of 8 Bosch remanufactured Exergy injectors for the LB7 Duramax, flowing 45% over stock. It is for the owner who wants more power without givi...

    View full details
    Original price $3,896.00 - Original price $3,896.00
    Original price
    $3,896.00
    $3,896.00 - $3,896.00
    Current price $3,896.00
  • Exergy Reman 150% Over Injectors, Set of 8 | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $5,736.00 - Original price $5,736.00
    Original price
    $5,736.00
    $5,736.00 - $5,736.00
    Current price $5,736.00

    A set of 8 Bosch remanufactured Exergy injectors for the LB7 Duramax, flowing 150% over stock. It is for a truck that already makes more power and ...

    View full details
    Original price $5,736.00 - Original price $5,736.00
    Original price
    $5,736.00
    $5,736.00 - $5,736.00
    Current price $5,736.00
  • DDP Duramax 01-04 LB7 Brand New Injector Set - 75 (45% Over)

    DDP
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $4,099.25
    $4,099.25 - $4,099.25
    Current price $4,099.25

    DDP Model DDPNLB7-75Duramax 01-04 LB7 Injector Set: Brand New injectors flowing at 45 percent over, capable of 725 RWHP with proper supporting modi...

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $4,099.25
    $4,099.25 - $4,099.25
    Current price $4,099.25
  • Exergy Reman 60% Over Injectors, Set of 8 | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $3,872.00 - Original price $3,872.00
    Original price
    $3,872.00
    $3,872.00 - $3,872.00
    Current price $3,872.00

    A set of 8 Bosch remanufactured Exergy injectors for the LB7 Duramax, flowing 60% over stock. It is for the owner who wants more power without givi...

    View full details
    Original price $3,872.00 - Original price $3,872.00
    Original price
    $3,872.00
    $3,872.00 - $3,872.00
    Current price $3,872.00
  • Exergy Reman 45% Over Injectors, Set of 8 | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $3,664.00 - Original price $3,664.00
    Original price
    $3,664.00
    $3,664.00 - $3,664.00
    Current price $3,664.00

    A set of 8 Bosch remanufactured Exergy injectors for the LB7 Duramax, flowing 45% over stock. It is for the owner who wants more power without givi...

    View full details
    Original price $3,664.00 - Original price $3,664.00
    Original price
    $3,664.00
    $3,664.00 - $3,664.00
    Current price $3,664.00
  • Exergy Reman 30% Over Injectors, Set of 8 | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $3,560.00 - Original price $3,560.00
    Original price
    $3,560.00
    $3,560.00 - $3,560.00
    Current price $3,560.00

    A set of 8 Bosch remanufactured Exergy injectors for the LB7 Duramax, flowing 30% over stock. Exergy calls this size a good upgrade for a close to ...

    View full details
    Original price $3,560.00 - Original price $3,560.00
    Original price
    $3,560.00
    $3,560.00 - $3,560.00
    Current price $3,560.00
  • Exergy Reman 100% Over Injectors, Set of 8 | 2001 to 2004 LB7 Duramax

    Exergy
    Original price $4,184.00 - Original price $4,184.00
    Original price
    $4,184.00
    $4,184.00 - $4,184.00
    Current price $4,184.00

    A set of 8 Bosch remanufactured Exergy injectors for the LB7 Duramax, flowing 100% over stock. It is for the owner who wants more power without giv...

    View full details
    Original price $4,184.00 - Original price $4,184.00
    Original price
    $4,184.00
    $4,184.00 - $4,184.00
    Current price $4,184.00
  • DDP Duramax 01-04 LB7 Brand New Injector Set - 50 (25% Over)

    DDP
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $3,909.25
    $3,909.25 - $3,909.25
    Current price $3,909.25

    DDP Model DDPNLB7-50Duramax 01-04 LB7 Injector Set: Brand New injector set at 25 percent over, approximately 50 RWHP over stock. Injector set is ca...

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $3,909.25
    $3,909.25 - $3,909.25
    Current price $3,909.25
  • DDP Duramax 01-04 LB7 Brand New Injector Set - SAC Nozzle 100% Over

    DDP
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $4,479.25
    $4,479.25 - $4,479.25
    Current price $4,479.25

    DDP Model DDPNLB7-200Duramax 01-04 LB7 Injector Set: Brand New injector set. SAC Nozzles flowing at 100 percent over with injector body modificatio...

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $4,479.25
    $4,479.25 - $4,479.25
    Current price $4,479.25
  • DDP Duramax 01-04 LB7 Brand New Injector Set - SAC Nozzle 150% Over

    DDP
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $4,669.25
    $4,669.25 - $4,669.25
    Current price $4,669.25

    DDP Model DDPNLB7-300Duramax 01-04 LB7 Injector Set: Brand New injector set. SAC Nozzles at 150 percent over with injector body modifications for a...

    View full details
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $4,669.25
    $4,669.25 - $4,669.25
    Current price $4,669.25
  • DDP Duramax 01-04 LB7 Brand New Injector Set - 100 (60% Over)

    DDP
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $4,289.25
    $4,289.25 - $4,289.25
    Current price $4,289.25

    DDP Model DDPNLB7-100Duramax 01-04 LB7 Injector Set: Brand New injector set flowing at 60 percent over, capable of 750-800 RWHP. Modified or Dual C...

    View full details
    Original price $0.00 - Original price $0.00
    Original price $0.00
    $4,289.25
    $4,289.25 - $4,289.25
    Current price $4,289.25

The LB7 is the original 6.6L Duramax, built by GM and Isuzu for 2001 to 2004 Chevy Silverado HD and GMC Sierra HD trucks. It has a cast iron block, aluminum heads, a Bosch CP3 pump and no DPF or EGR, which makes it a favorite for high mileage reliability and tuning.

Shop LB7 Duramax Parts by Category

Not sure what fits? Send us your VIN or call 865.640.2097 and we will match the right part.

LB7 Duramax FAQ

What is the LB7 known for?

A strong bottom end and no emissions equipment, which makes it popular for tuning and long term reliability.

What are common LB7 problems?

Injector failure is the most common issue, often from fuel contamination. Keeping fuel filtration in good shape helps prevent it.