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Flowtech Headers 11150FLT Headers, Long Tube, Steel, Painted, Oldsmobile, Pontiac, 350, 403, Pair

SKU: BIG11150FLT

Headers

Flowtech Headers 11150FLT Headers, Long Tube, Steel, Painted, Oldsmobile, Pontiac, 350, 403, Pair

SKU: BIG11150FLT

Headers

Sale ends in Calculating...

A$1,324.95 A$1,358.64
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

IMPORTANT NOTICE: Will not fit models with off-set engine. The paint applied to these headers is a temporary coating only and is designed to burn off during use. High temperature paint or other high temperature coatings are recommended.

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

68-77 Olds Headers 350/403

Data: v4.2 - Upd: 2026-09-30 21:26:36

Specifications

Product Attributes - Brand
Flowtech
Product Attributes - Manufacturer's Part Number
11150FLT
Product Attributes - Part Type
Headers
Product Attributes - Product Line
Flowtech Headers
Product Attributes - UPC
787480111500
Product Attributes - Header Style
Long tube one-piece
Product Attributes - Header Material
Steel
Product Attributes - Primary Tube Outside Diameter (in.)
1 3/4 in.
Product Attributes - Header Color
Temporary non-high temperature paint
Product Attributes - Flange Style
Standard
Product Attributes - Weld-Up
No
Product Attributes - Collector Attachment
3-bolt flange
Product Attributes - Collector Diameter (in.)
3.00
Product Attributes - Collector Reducers Included
Yes
Product Attributes - Collector Reducer Exit Diameter
2.500 in.
Product Attributes - Tuned
No
Product Attributes - Primary Tube Gauge
18-gauge
Product Attributes - Flange Thickness (in.)
0.31 in.
Product Attributes - Bolts/Studs Included
Yes
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.
Product Attributes - Notes
Will not fit models with off-set engine. The paint applied to these headers is a temporary coating only and is designed to burn off during use. High temperature paint or other high temperature coatings are recommended.

Reference Information

Brand Name/s Flowtech
StreetFX SKU big11150FLT
SFX Item ID 5092234
Supplier Item Code 5092234
Manufacturer SKU 11150FLT
Manufacturer UPC 787480111500
Alternative References FLT11150

Compatibility

Application Data
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelS
    Beginning Year1977
    Ending Year1977
    Engine TypeV8
    Engine FamilyOldsmobile V8
    Engine Size5.7L/350
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
    Footnotes3 - Must modify stock exhaust to retain catalytic converters.
    Liter5.7
    CID350
    CC5733
    Engine VIN CodeM
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelS
    Beginning Year1977
    Ending Year1977
    Engine TypeV8
    Engine FamilyOldsmobile V8
    Engine Size6.6L/403
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
    Footnotes3 - Must modify stock exhaust to retain catalytic converters.
    Liter5.7
    CID350
    Engine VIN CodeK
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelESPRIT
    Beginning Year1971
    Ending Year1977
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyOldsmobile V8
    Engine Size5.7L/350
    DrivetrainRWD
    Engine VIN CodeR
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
    Footnotes3 - Must modify stock exhaust to retain catalytic converters.
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelFORMULA
    Beginning Year1971
    Ending Year1977
    Engine TypeV8
    Engine FamilyOldsmobile V8
    Engine Size6.6L/403
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
    Footnotes3 - Must modify stock exhaust to retain catalytic converters.
    Liter6.6
    CID403
    Engine VIN CodeK
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelFORMULA
    Beginning Year1971
    Ending Year1979
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyPontiac V8
    Engine Size6.6L/400
    DrivetrainRWD
    Engine VIN CodeZ
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelFORMULA
    Beginning Year1971
    Ending Year1979
    Engine TypeV8
    Engine FamilyOldsmobile V8
    Engine Size6.6L/403
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
    Footnotes3 - Must modify stock exhaust to retain catalytic converters.
    Liter6.6
    CID403
    Engine VIN CodeK
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelFORMULA
    Beginning Year1977
    Ending Year1979
    Engine TypeV8
    Liter5.7
    CID350
    CC5733
    Engine FamilyOldsmobile V8
    Engine Size6.6L/403
    DrivetrainRWD
    Engine VIN CodeH
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
    Footnotes3 - Must modify stock exhaust to retain catalytic converters.
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1977
    Ending Year1979
    Engine TypeV8
    Liter6.6
    CID400
    CC5733
    Engine FamilyPontiac V8
    Engine Size6.6L/400
    DrivetrainRWD
    Engine VIN CodeZ
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1977
    Ending Year1979
    Engine TypeV8
    Liter6.6
    CID403
    Engine FamilyOldsmobile V8
    Engine Size6.6L/403
    DrivetrainRWD
    CC5733
    Engine VIN CodeK
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelTRANS AM
    Beginning Year1977
    Ending Year1979
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyOldsmobile V8
    Engine Size6.6L/403
    DrivetrainRWD
    Engine VIN CodeH
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftYes
    Footnotes3 - Must modify stock exhaust to retain catalytic converters.
  • MakeOLDSMOBILE
    ModelCUTLASS
    SubmodelS
    Beginning Year1971
    Ending Year1971
    Engine TypeV8
    Liter5.7
    CID350
    CC5733
    Engine FamilyOldsmobile V8
    Engine Size5.7L/350
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
    Footnotes3 - Must modify stock exhaust to retain catalytic converters.
    Engine VIN CodeM
  • MakeOLDSMOBILE
    ModelCUTLASS
    SubmodelS
    Beginning Year1971
    Ending Year1972
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyOldsmobile V8
    Engine Size5.7L/350
    DrivetrainRWD
    CC5733
    Engine VIN CodeR
  • MakeOLDSMOBILE
    ModelCUTLASS
    SubmodelS
    Beginning Year1972
    Ending Year1973
    Engine TypeV8
    Engine FamilyOldsmobile V8
    Engine Size5.7L/350
    DrivetrainRWD
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
    Footnotes3 - Must modify stock exhaust to retain catalytic converters.
    Liter5.7
    CID350
    CC5733
    Engine VIN CodeH
  • MakeOLDSMOBILE
    ModelCUTLASS
    SubmodelS
    Beginning Year1972
    Ending Year1973
    Engine TypeV8
    Liter5.7
    CID350
    CC5733
    Engine FamilyOldsmobile V8
    Engine Size5.7L/350
    DrivetrainRWD
    Engine VIN CodeH
  • MakeOLDSMOBILE
    ModelCUTLASS
    SubmodelS
    Beginning Year1972
    Ending Year1974
    Engine TypeV8
    Liter5.7
    CID350
    CC5733
    Engine FamilyOldsmobile V8
    Engine Size5.7L/350
    DrivetrainRWD
    Engine VIN CodeK
  • MakeOLDSMOBILE
    ModelCUTLASS
    SubmodelS
    Beginning Year1972
    Ending Year1974
    Engine TypeV8
    Liter5.7
    CID350
    CC5733
    Engine FamilyOldsmobile V8
    Engine Size5.7L/350
    DrivetrainRWD
    Engine VIN CodeM
  • MakeOLDSMOBILE
    ModelCUTLASS
    SubmodelS
    Beginning Year1972
    Ending Year1974
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyOldsmobile V8
    Engine Size5.7L/350
    DrivetrainRWD
    CC5733
    Engine VIN CodeM
  • MakeOLDSMOBILE
    ModelCUTLASS
    SubmodelS
    Beginning Year1972
    Ending Year1975
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyOldsmobile V8
    Engine Size5.7L/350
    DrivetrainRWD
    CC5733
    Engine VIN CodeK
  • MakeOLDSMOBILE
    ModelCUTLASS
    SubmodelS
    Beginning Year1977
    Ending Year1977
    Engine TypeV8
    Liter6.6
    CID403
    Engine FamilyOldsmobile V8
    Engine Size6.6L/403
    DrivetrainRWD
    CC5733
    Engine VIN CodeK
  • MakeOLDSMOBILE
    ModelCUTLASS SALON
    SubmodelS
    Beginning Year1975
    Ending Year1975
    Engine TypeV8
    Liter5.7
    CID350
    CC5733
    Engine FamilyOldsmobile V8
    Engine Size5.7L/350
    DrivetrainRWD
    Engine VIN CodeK
  • MakeOLDSMOBILE
    ModelCUTLASS SALON
    SubmodelS
    Beginning Year1976
    Ending Year1977
    Engine TypeV8
    Liter5.7
    CID350
    CC5733
    Engine FamilyOldsmobile V8
    Engine Size5.7L/350
    DrivetrainRWD
    Engine VIN CodeR
  • MakeOLDSMOBILE
    ModelCUTLASS SALON
    SubmodelS
    Beginning Year1977
    Ending Year1977
    Engine TypeV8
    Liter6.6
    CID403
    CC5733
    Engine FamilyOldsmobile V8
    Engine Size6.6L/403
    DrivetrainRWD
    Engine VIN CodeK
  • MakeOLDSMOBILE
    ModelCUTLASS TIARA
    SubmodelS
    Beginning Year1976
    Ending Year1976
    Engine TypeV8
    Liter5.7
    CID350
    CC5733
    Engine FamilyOldsmobile V8
    Engine Size5.7L/350
    DrivetrainRWD
    Engine VIN CodeR
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelS
    Beginning Year1977
    Ending Year1977
    Engine TypeV8
    Liter6.6
    CID400
    CC5733
    Engine FamilyPontiac V8
    Engine Size6.6L/400
    DrivetrainRWD
    Engine VIN CodeZ
  • MakePONTIAC
    ModelFIREBIRD
    SubmodelS
    Beginning Year1977
    Ending Year1977
    Engine TypeV8
    Liter6.6
    CID403
    CC5733
    Engine FamilyOldsmobile V8
    Engine Size6.6L/403
    DrivetrainRWD
    Engine VIN CodeK

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