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Flowtech Upright Headers

Part # 11546FLT Be the first to write a review

Fits Small Block Chevy, 1-3/4" Primary Tubes, 409 Stainless Steel Upright Headers- Natural Finish

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Flowtech Upright Headers

In Stock
Free Shipping - Lower 48 US States
$415.95
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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

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 3/4 IN
1.75 IN
Product TypeHeaders
QuantitySold as a Pair
Sheen LevelSemi-Gloss
Sub CategoryExhaust Manifolds
Tube Wall Thickness16 GU
UPC090127734964
Part Number11546FLT
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
    $415.95