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Flowtech Exhaust

Flowtech Upright Headers

Part # 11545FLT Be the first to write a review

Fits Small Block Chevy, 1-5/8" Primary Tubes, 409 Stainless Steel Upright Headers- Natural Finish

Flowtech Upright Headers

In Stock
Free Shipping - Lower 48 US States
$399.95
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4

Emissions

This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street.

    See Emissions Details
Flowtech Headers are the perfect combination of quality and value. These Small Block Chevy Upright headers available in 1-5/8" and 1-3/4" tube diameters are ideal for even big cubic inch Small Block Chevy engines. They feature a merged collector coupled with a collector spear that is welded inside the collector. These components help to improve the flow and performance of the header.

Features:

  • CNC Mandrel-bent tubes provide consistent tubing diameters for smooth flow and increases the cylinder scavenging effect and improves engine breathing
  • Heavy duty 16-gauge 409SS tubing for increased strength and durability
  • 1-5/8” and 1-3/4” tubing diameters available for increased exhaust flow increasing performance and improved throttle response
  • 3” collector for maximum strength and exhaust flow
  • Extra thick header flange for a leak-free seal and maximum strength
  • Welded-in collector merge spears to control exhaust gas re-entry into primary tubes
Logan Duvall's demolition derby car

About Flowtech Exhaust

Flowtech provides high-quality performance exhaust systems at a great value. Explore our lineup of headers, mufflers, and exhaust systems at our official retailer, Holley.com!​

Air Injection TubesNo
ApplicationSmall Block Chevy
Bolt Size3/8-16 x 3/4 IN
Bolts IncludedNo
Brand Flowtech Exhaust
California Proposition 65Yes
CARB (California) CompliantNo
Catalytic Converter Quantity0
CategoryExhaust
Collector AttachmentWeld-On
Collector Diameter3.00 IN
Collector Length12.00 IN
Collector Port Diameter3.00 IN
Collector Reducer IncludedNo
Collector Reducer Outlet DiameterN/A
ColorSilver
DesignUpright
Drive2WD
4WD
EGT PortNo
Emission Code4
EngineChevrolet Small Block Gen I
FinishNatural
Flange Thickness0.375 IN
3/8 IN
Gasket Or Seal IncludedNo
Grade TypePerformance
Header SeriesFlowtech
Header StyleUpright
Installed Height37.00 IN
Material304 Stainless Steel
Mounting Hardware IncludedNo
Oxygen Sensor PortNo
Part TypeExhaust Header
Port ShapeSquare
Primary Tubing Diameter1 5/8 IN
1.625 IN
Product TypeHeaders
QuantitySold as a Pair
Sheen LevelSemi-Gloss
Sub CategoryExhaust Manifolds
Tube Wall Thickness16 GU
UPC090127734957
Part Number11545FLT
4

This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street.

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

Gaskets and hardware sold separately.
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    *Free Shipping and Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

    Some parts are not legal for use in California or other states with similar regulations.

    Flowtech Upright Headers
    Flowtech Upright Headers
    $399.95