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Flowtech Headers 11706-1FLT Headers, Block Hugger, Steel, Silver Ceramic Coated, Round Port, Street Rod, Chevy Small Block LS, Pair

SKU: BIG11706-1FLT

Headers

Flowtech Headers 11706-1FLT Headers, Block Hugger, Steel, Silver Ceramic Coated, Round Port, Street Rod, Chevy Small Block LS, Pair

SKU: BIG11706-1FLT

Headers
A$1,479.04
BACKORDER This item will be special ordered in for you. Contact us prior to purchase if you require an ETA.
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Description

IMPORTANT NOTICE: Headers will not work with OEM factory motor mounts.

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 00:43:39

Specifications

Product Attributes - Brand
Flowtech
Product Attributes - Manufacturer's Part Number
11706-1FLT
Product Attributes - Part Type
Headers
Product Attributes - Product Line
Flowtech Headers
Product Attributes - UPC
090127690819
Product Attributes - Header Style
Block hugger
Product Attributes - Header Material
Steel
Product Attributes - Primary Tube Outside Diameter (in.)
1 5/8 in.
Product Attributes - Header Color
Silver ceramic coated
Product Attributes - Flange Style
Standard
Product Attributes - Weld-Up
No
Product Attributes - Cylinder Head Port Shape
Round
Product Attributes - Collector Attachment
3-bolt flange
Product Attributes - Collector Diameter (in.)
2.50
Product Attributes - Collector Reducers Included
Yes
Product Attributes - Collector Reducer Exit Diameter
2.000 in.
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.
Product Attributes - Notes
Headers will not work with OEM factory motor mounts.

Reference Information

Brand Name/s Flowtech
StreetFX SKU big11706-1FLT
SFX Item ID 5092162
Supplier Item Code 5092162
Manufacturer SKU 11706-1FLT
Manufacturer UPC N/A

Compatibility

Application Data
  • MakeCHEVROLET
    ModelSTREET ROD
    Beginning Year1923
    Ending Year1949
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size4.8L/294
    DrivetrainRWD
    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
    ModelSTREET ROD
    Beginning Year1923
    Ending Year1949
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    DrivetrainRWD
    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
    ModelSTREET ROD
    Beginning Year1923
    Ending Year1949
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.7L/350
    DrivetrainRWD
    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
    ModelSTREET ROD
    Beginning Year1923
    Ending Year1949
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.0L/364
    DrivetrainRWD
    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
    ModelSTREET ROD
    Beginning Year1923
    Ending Year1949
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.2L/376
    DrivetrainRWD
    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
    ModelSTREET ROD
    Beginning Year1923
    Ending Year1949
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size7.0L/427
    DrivetrainRWD
    Power SteeringNo
    Power Brakes (application)No
    Air ConditioningNo
    Standard Transmission Column ShiftNo
    Standard Transmission Floor ShiftNo
    Automatic Transmission Column ShiftNo
    Automatic Transmission Floor ShiftNo

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