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Gibson 05-06 Chevrolet Avalanche 2500 LS 8.1L 1-3/4in 16 Gauge Performance Header - Stainless

SKU: GIBGP134S

Headers

GIB Headers - Stainless...

Gibson 05-06 Chevrolet Avalanche 2500 LS 8.1L 1-3/4in 16 Gauge Performance Header - Stainless

SKU: GIBGP134S

Headers

GIB Headers - Stainless...

A$1,428.58
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
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Description

Every Gibson Performance Header is Dyno-tuned and engineered to deliver more usable horsepower and torque at low and mid-range RPM highway speeds. Improves engines ability to breathe and cooler operating engine temperature. Designed as a direct replacement for the factory manifolds, using the stock crossover pipe. They are well suited for lowered and raised vehicles, street and off-road. 50 State Street legal. Meets EPA and CARB requirements. Will not affect the factory warranty. No welding required. Uses OEM style connections. 3/8 in. Heavy Duty Laser Cut Port Flanges- No Warping or Leaking. Premium Gaskets and Hardware included. Backed by a Lifetime Limited Warranty.

Part Type

Exhaust Header

Data: v4.2 - Upd: 2026-10-13 16:43:20

Features

  • Heavy Duty 3/8 in. Thick Laser Cut Port Flanges
  • Heavy Duty 409L Stainless 16 Gauge Tubing
  • Mandrel Bent Tubing
  • No Welding Required
  • Premium Gaskets and Hardware
  • Uses OEM Style Connections

Specifications

Product Attributes - UPC
677418012422
Product Attributes - Brand
Gibson Performance Exhaust
Product Attributes - Notes
Heavy-duty 409L stainless steel tubing. Fits models without EGR. No provisions for air injection.
Product Attributes - Tuned
No
Product Attributes - Weld-Up
No
Product Attributes - Quantity
Sold as a pair.
Product Attributes - Emissions
California EO Approved
Product Attributes - Part Type
Headers
Product Attributes - Flange Style
Standard
Product Attributes - Header Color
Natural
Product Attributes - Header Style
Shorty
Product Attributes - Product Line
Gibson Headers
Product Attributes - Header Material
409 stainless steel
Product Attributes - Gaskets Included
Yes
Product Attributes - CARB EO Number(s)
D-411-11
Product Attributes - Primary Tube Gauge
16-gauge
Product Attributes - Bolts/Studs Included
Yes
Product Attributes - Collector Attachment
Stock flange
Product Attributes - Motor Mounts Included
No
Product Attributes - Flange Thickness (in.)
0.38 in.
Product Attributes - Crossover Pipe Included
No
Product Attributes - Manufacturer's Part Number
GP134S
Product Attributes - Collector Reducers Included
No
Product Attributes - Transmission Mount Included
No
Product Attributes - Catalytic Converter(s) Included
No
Product Attributes - Primary Tube Outside Diameter (in.)
1 3/4 in.

Reference Information

Brand Name/s Gibson
StreetFX SKU gibGP134S
SFX Item ID 4084306
Supplier Item Code 4084306
Manufacturer SKU GP134S
Manufacturer UPC 677418012422
Alternative References 8.1L, 1-3/4in

Compatibility

Application Data
  • MakeCHEVROLET
    ModelAVALANCHE 2500
    Beginning Year2004
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeCHEVROLET
    ModelAVALANCHE 2500
    Beginning Year2004
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeCHEVROLET
    ModelAVALANCHE 2500
    SubmodelLS
    Beginning Year2005
    Ending Year2006
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeCHEVROLET
    ModelAVALANCHE 2500
    SubmodelLS
    Beginning Year2005
    Ending Year2006
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeCHEVROLET
    ModelAVALANCHE 2500
    SubmodelLT
    Beginning Year2005
    Ending Year2006
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeCHEVROLET
    ModelAVALANCHE 2500
    SubmodelLT
    Beginning Year2005
    Ending Year2006
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeCHEVROLET
    ModelSILVERADO 2500 HD
    Beginning Year2004
    Ending Year2005
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeCHEVROLET
    ModelSILVERADO 2500 HD
    Beginning Year2004
    Ending Year2005
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeCHEVROLET
    ModelSILVERADO 3500
    Beginning Year2004
    Ending Year2005
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeCHEVROLET
    ModelSILVERADO 3500
    Beginning Year2004
    Ending Year2005
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeCHEVROLET
    ModelSUBURBAN 2500
    Beginning Year2004
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeCHEVROLET
    ModelSUBURBAN 2500
    Beginning Year2004
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeCHEVROLET
    ModelSUBURBAN 2500
    SubmodelLS
    Beginning Year2005
    Ending Year2005
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeCHEVROLET
    ModelSUBURBAN 2500
    SubmodelLS
    Beginning Year2005
    Ending Year2006
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeCHEVROLET
    ModelSUBURBAN 2500
    SubmodelLT
    Beginning Year2005
    Ending Year2005
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeCHEVROLET
    ModelSUBURBAN 2500
    SubmodelLT
    Beginning Year2005
    Ending Year2005
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeGMC
    ModelSIERRA 2500 HD
    Beginning Year2004
    Ending Year2005
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeGMC
    ModelSIERRA 2500 HD
    Beginning Year2004
    Ending Year2005
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeGMC
    ModelSIERRA 3500
    Beginning Year2004
    Ending Year2005
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeGMC
    ModelSIERRA 3500
    Beginning Year2004
    Ending Year2005
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeGMC
    ModelYUKON XL 2500
    Beginning Year2004
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeGMC
    ModelYUKON XL 2500
    Beginning Year2004
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeGMC
    ModelYUKON XL 2500
    SubmodelSLE
    Beginning Year2005
    Ending Year2005
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeGMC
    ModelYUKON XL 2500
    SubmodelSLE
    Beginning Year2005
    Ending Year2005
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.
  • MakeGMC
    ModelYUKON XL 2500
    SubmodelSLT
    Beginning Year2005
    Ending Year2005
    Engine TypeV8
    Engine FamilyChevy big block Gen VII
    Engine Size8.1L/496
    Drivetrain4WD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    Footnotes1 - Has no air injection. 9 - Automatic only.

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