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Flowtech Headers 11585FLT Headers, Upright, 1 1/2 in. Primary, 2.5 in. Collector, Stainless Steel, Natural, GM, 2.8L, 3.1L, 3.4L, Pair

SKU: BIG11585FLT

Headers

Flowtech Headers 11585FLT Headers, Upright, 1 1/2 in. Primary, 2.5 in. Collector, Stainless Steel, Natural, GM, 2.8L, 3.1L, 3.4L, Pair

SKU: BIG11585FLT

Headers

Sale ends in Calculating...

A$872.23 A$918.71
IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.
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Description

Flowtech headers are designed to provide optimum exhaust flow for increased horsepower, torque, fuel economy, and improved throttle response. Leak-tested for maximum performance, they feature the industry's best welds for durability and are carefully engineered for precise fit. Available for a wide range of applications, they're offered in block hugger, competition, fenderwell, lakester, long tube, mid-length, shorty, upright, and turbo styles. Varying with the application, Flowtech headers are constructed from sturdy and lightweight cold-rolled mild steel or stainless steel for increased strength and durability. All tubing is mandrel-bent to provide consistent tubing diameter for smooth flow and increased exhaust velocity. Extra-thick, machined header flanges provide a leak-free seal and maximum strength. For long-term rust and corrosion-resistance, available finishes include natural and polished stainless steel, high heat-resistant black paint, or a satin silver metallic ceramic thermal barrier coating. All mounting hardware and premium gaskets are included.

Important notes: Breaking in an engine with ceramic coated headers WILL result in damage to the coating and will VOID all warranties. Ceramic coated headers require several heat cycles to fully cure before they will withstand extreme heat. Hooker recommends using cast iron exhaust manifolds or old headers to break in new engines to avoid coating damage. Flowtech does not recommend the use of header wraps as this will void the warranty.

Part Type

Headers

Data: v4.2 - Upd: 2026-09-29 13:11:04

Specifications

Product Attributes - Brand
Flowtech
Product Attributes - Manufacturer's Part Number
11585FLT
Product Attributes - Part Type
Headers
Product Attributes - Product Line
Flowtech Headers
Product Attributes - UPC
090127072943
Product Attributes - Header Style
Upsweep
Product Attributes - Header Material
409 stainless steel
Product Attributes - Primary Tube Outside Diameter (in.)
1 1/2 in.
Product Attributes - Header Color
Natural
Product Attributes - Flange Style
Standard
Product Attributes - Weld-Up
No
Product Attributes - Cylinder Head Port Shape
Round
Product Attributes - Collector Attachment
Slip fit
Product Attributes - Collector Diameter (in.)
2.50
Product Attributes - Collector Reducers Included
No
Product Attributes - Tuned
No
Product Attributes - Primary Tube Gauge
16-gauge
Product Attributes - Flange Thickness (in.)
0.38 in.
Product Attributes - Bolts/Studs Included
No
Product Attributes - Gaskets Included
Yes
Product Attributes - Crossover Pipe Included
No
Product Attributes - Catalytic Converter(s) Included
No
Product Attributes - Motor Mounts Included
No
Product Attributes - Transmission Mount Included
No
Product Attributes - Quantity
Sold as a pair.

Reference Information

Brand Name/s Flowtech
StreetFX SKU big11585FLT
SFX Item ID 5092254
Supplier Item Code 5092254
Manufacturer SKU 11585FLT
Manufacturer UPC 90127072943
Alternative References 2.8L, 3.1L, 3.4L

Compatibility

Application Data
  • MakeBUICK
    Beginning Year1980
    Ending Year1989
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
  • MakeBUICK
    Beginning Year1980
    Ending Year1989
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
  • MakeBUICK
    Beginning Year1989
    Ending Year2005
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
  • MakeBUICK
    Beginning Year1989
    Ending Year2005
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
  • MakeBUICK
    Beginning Year2002
    Ending Year2005
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
  • MakeBUICK
    Beginning Year2002
    Ending Year2005
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    Beginning Year1980
    Ending Year1993
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
  • MakeCHEVROLET
    Beginning Year1980
    Ending Year1993
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    Beginning Year1990
    Ending Year2003
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
  • MakeCHEVROLET
    Beginning Year1990
    Ending Year2003
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
  • MakeCHEVROLET
    Beginning Year1993
    Ending Year2009
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
  • MakeCHEVROLET
    Beginning Year1993
    Ending Year2009
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
  • MakeOLDSMOBILE
    Beginning Year1980
    Ending Year1989
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
  • MakeOLDSMOBILE
    Beginning Year1980
    Ending Year1989
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
  • MakeOLDSMOBILE
    Beginning Year1989
    Ending Year1999
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
  • MakeOLDSMOBILE
    Beginning Year1989
    Ending Year1999
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
  • MakeOLDSMOBILE
    Beginning Year1991
    Ending Year2004
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
  • MakeOLDSMOBILE
    Beginning Year1991
    Ending Year2004
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
  • MakePONTIAC
    Beginning Year1980
    Ending Year1989
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
  • MakePONTIAC
    Beginning Year1980
    Ending Year1989
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
  • MakePONTIAC
    Beginning Year1988
    Ending Year2003
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
  • MakePONTIAC
    Beginning Year1988
    Ending Year2003
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
  • MakePONTIAC
    Beginning Year1991
    Ending Year2009
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
  • MakePONTIAC
    Beginning Year1991
    Ending Year2009
    Engine TypeV6
    Engine FamilyGM V6
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes

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