Australia-wide shipping on performance, 4x4 and vehicle-specific upgrades.

Flowtech Headers 11545FLT Headers, Upright, 1 5/8 in. Primary, 3 in. Collector, Stainless Steel, Natural, Chevy, Small Block, Pair

SKU: BIG11545FLT

Headers

Flowtech Headers 11545FLT Headers, Upright, 1 5/8 in. Primary, 3 in. Collector, Stainless Steel, Natural, Chevy, Small Block, Pair

SKU: BIG11545FLT

Headers

Sale ends in Calculating...

A$847.44
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.
View cart
We accept
American Express
Mastercard
Visa
PayPal Checkout
Direct Deposit
Afterpay
Apple Pay
Google Pay
Zip Pay

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: 2026-10-10 18:46:20

Specifications

Product Attributes - Brand
Flowtech
Product Attributes - Manufacturer's Part Number
11545FLT
Product Attributes - Part Type
Headers
Product Attributes - Product Line
Flowtech Headers
Product Attributes - UPC
090127734957
Product Attributes - Header Style
Upsweep
Product Attributes - Header Material
409 stainless steel
Product Attributes - Primary Tube Outside Diameter (in.)
1 5/8 in.
Product Attributes - Header Color
Natural
Product Attributes - Flange Style
Standard
Product Attributes - Weld-Up
No
Product Attributes - Cylinder Head Port Shape
Square
Product Attributes - Collector Attachment
Slip fit
Product Attributes - Collector Diameter (in.)
3.00
Product Attributes - Collector Reducers Included
No
Product Attributes - Tuned
No
Product Attributes - Primary Tube Gauge
16-gauge
Product Attributes - Spark Plug Position
Angle/Straight
Product Attributes - Flange Thickness (in.)
0.38 in.
Product Attributes - Bolts/Studs Included
No
Product Attributes - Gaskets Included
No
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 big11545FLT
SFX Item ID 5092239
Supplier Item Code 5092239
Manufacturer SKU 11545FLT
Manufacturer UPC 90127734957

Compatibility

Application Data
  • MakeCHEVROLET
    ModelC10 PICKUP
    SubmodelSCOTTSDALE
    Beginning Year1982
    Ending Year1986
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyOldsmobile diesel V8
    Engine Size6.6L/400
    DrivetrainRWD
    Engine VIN CodeH
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
    CC5358
  • MakeCHEVROLET
    ModelC10 PICKUP
    SubmodelSCOTTSDALE
    Beginning Year1982
    Ending Year1986
    Engine TypeV8
    Liter6.6
    CID305
    Engine FamilyOldsmobile V8
    Engine Size5.0L/305
    Drivetrain4WD
    Engine VIN CodeF
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    CC5031
  • MakeCHEVROLET
    ModelC10 PICKUP
    SubmodelSILVERADO
    Beginning Year1972
    Ending Year1975
    Engine TypeV8
    Liter4.6
    CID283
    Engine FamilyChevy small block Gen I
    Engine Size4.6L/283
    Drivetrain4WD
    Engine VIN CodeJ
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
    CC4638
  • MakeCHEVROLET
    ModelC10 PICKUP
    SubmodelSILVERADO
    Beginning Year1975
    Ending Year1973
    Engine TypeV8
    Liter5.7
    CID307
    Engine FamilyChevy small block Gen I
    Engine Size5.0L/307
    DrivetrainRWD
    Engine VIN CodeX
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    CC5031
  • MakeCHEVROLET
    ModelC10 PICKUP
    SubmodelSILVERADO
    Beginning Year1973
    Ending Year1976
    Engine TypeV8
    Liter5.0
    CID307
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    Drivetrain4WD
    Engine VIN CodeU
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
    CC5031
  • MakeCHEVROLET
    ModelC10 PICKUP
    SubmodelSILVERADO
    Beginning Year1976
    Ending Year1986
    Engine TypeV8
    Liter4.6
    CID283
    Engine FamilyChevy small block Gen I
    Engine Size4.6L/283
    Drivetrain4WD
    Engine VIN CodeL
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    CC5031
  • MakeCHEVROLET
    ModelC10 PICKUP
    SubmodelSILVERADO
    Beginning Year1973
    Ending Year1973
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size4.6L/283
    DrivetrainRWD
    Engine VIN CodeF
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
    CC4638
  • MakeCHEVROLET
    ModelC10 PICKUP
    SubmodelSILVERADO
    Beginning Year1977
    Ending Year1973
    Engine TypeV8
    Liter5.3
    CID327
    Engine FamilyOldsmobile diesel V8
    Engine Size5.3L/327
    DrivetrainRWD
    Engine VIN CodeW
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    CC5358
  • MakeCHEVROLET
    ModelC10 PICKUP
    SubmodelSILVERADO
    Beginning Year1978
    Ending Year1973
    Engine TypeV8
    Liter4.6
    CID283
    Engine FamilyOldsmobile diesel V8
    Engine Size4.6L/283
    Drivetrain4WD
    Engine VIN CodeZ
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
    CC4638
  • MakeCHEVROLET
    ModelC10 PICKUP
    SubmodelSILVERADO
    Beginning Year1973
    Ending Year1973
    Engine TypeV8
    Liter5.3
    CID327
    Engine FamilyOldsmobile V8
    Engine Size5.3L/327
    DrivetrainRWD
    Engine VIN CodeY
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    CC5358
  • MakeCHEVROLET
    ModelC10 PICKUP
    SubmodelSILVERADO
    Beginning Year1968
    Ending Year1973
    Engine TypeV8
    Liter5.3
    CID327
    Engine FamilyChevy small block Gen I
    Engine Size5.3L/327
    Drivetrain4WD
    Engine VIN CodeY
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
    CC5358
  • MakeCHEVROLET
    ModelC10 PICKUP
    SubmodelSILVERADO
    Beginning Year1974
    Ending Year1969
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    Drivetrain4WD
    Engine VIN CodeV
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    CC5031
  • MakeCHEVROLET
    ModelC10 PICKUP
    SubmodelSILVERADO
    Beginning Year1980
    Ending Year1986
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    DrivetrainRWD
    Engine VIN CodeM
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
    CC5031
  • MakeCHEVROLET
    ModelC10 PICKUP
    SubmodelSILVERADO
    Beginning Year1974
    Ending Year1986
    Engine TypeV8
    Liter5.0
    CID305
    Engine FamilyChevy small block Gen I
    Engine Size5.0L/305
    DrivetrainRWD
    Engine VIN CodeH
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    CC5031
  • MakeCHEVROLET
    ModelC10 PICKUP
    SubmodelSILVERADO
    Beginning Year1975
    Ending Year1986
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    Drivetrain4WD
    Engine VIN CodeY
    CC5031
  • MakeCHEVROLET
    ModelC10 SUBURBAN
    SubmodelSCOTTSDALE
    Beginning Year1967
    Ending Year1967
    Engine TypeV8
    Liter4.6
    CID307
    Engine FamilyChevy small block Gen I
    Engine Size5.0L/307
    Drivetrain4WD
    Engine VIN CodeV
    CC5031
  • MakeCHEVROLET
    ModelC10 SUBURBAN
    SubmodelSCOTTSDALE
    Beginning Year1967
    Ending Year1969
    Engine TypeV8
    Liter5.3
    CID327
    Engine FamilyOldsmobile V8
    Engine Size5.3L/327
    DrivetrainRWD
    Engine VIN CodeB
    CC5358
  • MakeCHEVROLET
    ModelC10 SUBURBAN
    SubmodelSCOTTSDALE
    Beginning Year1968
    Ending Year1968
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyChevy small block Gen I
    Engine Size5.7L/350
    Drivetrain4WD
    Engine VIN CodeE
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
    CC5031
  • MakeCHEVROLET
    ModelC10 SUBURBAN
    SubmodelSCOTTSDALE
    Beginning Year1971
    Ending Year1969
    Engine TypeV8
    Liter6.6
    CID305
    Engine FamilyChevy small block Gen I
    Engine Size5.0L/305
    Drivetrain4WD
    Engine VIN CodeE
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    CC5031
  • MakeCHEVROLET
    ModelC10 SUBURBAN
    SubmodelSCOTTSDALE
    Beginning Year1971
    Ending Year1969
    Engine TypeV8
    Liter6.6
    CID400
    Engine FamilyChevy small block Gen I
    Engine Size6.6L/400
    DrivetrainRWD
    Engine VIN CodeU
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
    CC5031
  • MakeCHEVROLET
    ModelC10 SUBURBAN
    SubmodelSCOTTSDALE
    Beginning Year1969
    Ending Year1972
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyOldsmobile diesel V8
    Engine Size5.7L/350
    Drivetrain4WD
    Engine VIN CodeE
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    CC5031
  • MakeCHEVROLET
    ModelC10 SUBURBAN
    SubmodelSCOTTSDALE
    Beginning Year1969
    Ending Year1974
    Engine TypeV8
    Liter5.7
    CID350
    Engine FamilyOldsmobile diesel V8
    Engine Size5.7L/350
    DrivetrainRWD
    Engine VIN CodeP
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
    CC5031
  • MakeCHEVROLET
    ModelC10 SUBURBAN
    SubmodelSCOTTSDALE
    Beginning Year1970
    Ending Year1970
    Engine TypeV8
    Liter6.6
    CID307
    Engine FamilyChevy small block Gen I
    Engine Size5.0L/307
    Drivetrain4WD
    Engine VIN CodeA
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    CC5031
  • MakeCHEVROLET
    ModelC10 SUBURBAN
    SubmodelSCOTTSDALE
    Beginning Year1970
    Ending Year1970
    Engine TypeV8
    Liter5.7
    CID307
    Engine FamilyChevy small block Gen I
    Engine Size5.0L/307
    Drivetrain4WD
    Engine VIN CodeB
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo
    CC5031
  • MakeCHEVROLET
    ModelC10 SUBURBAN
    SubmodelSCOTTSDALE
    Beginning Year1971
    Ending Year1971
    Engine TypeV8
    Liter6.6
    CID307
    Engine FamilyBuick V8
    Engine Size5.0L/307
    DrivetrainRWD
    Engine VIN CodeH
    Power SteeringYes
    Power Brakes (application)Yes
    Air ConditioningYes
    Standard Transmission Column ShiftYes
    Standard Transmission Floor ShiftYes
    Automatic Transmission Column ShiftYes
    Automatic Transmission Floor ShiftYes
    CC5031

Loading compatibility information...

Keep shopping

More from Flowtech