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Flowtech

Flowtech Upright Headers

GM 2.8/3.1/3.4L V6, Round Port Upright Headers 1-5/8" Primary, 20" Long, 27" tall, 2-1/2" x 10" Collector - 409SS Natural Finish

Part # 11586FLT

Flowtech Upright Headers

In Stock
Free Shipping - Lower 48 US States
$195.95
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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
These Flowtech upright derby style headers fit the 2.8L, 3.1L and 3.4L GM V6 engines with both round port or D-port style exhaust ports. 1-1/2 in. and 1-5/8 in. mandrel bent primary tubes provide consistent tubing diameters for smooth flow of the exhaust pulses and increase the cylinder scavenging of the exhaust to improve engine breathing. The headers are constructed from heavy duty 16-gauge 409 stainless steel tubing for increased strength and durability. These headers use a 10 in. long, 2.5 in. collector with 20 in. long primary tubes. The 3/8 in. thick header flange provides a leak-free seal and maximizes strength.

Features:

  • Mandrel bent tubes provide consistent tubing diameters for better exhaust pulse flow and improved performance
  • 1-1/2 in. and 1-5/8 in. primary diameters available for increased exhaust flow and improved throttle response
  • Heavy duty 16-gauge 409 Stainless Steel used for strength and durability
  • 10 in. long, 2.5 in. collector improves exhaust flow
  • 3/8 in. thick header flange for a leak-free seal and maximum strength
  • Available for both round and D-port exhaust ports
  • Header gaskets included

About Flowtech

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!​

Bolt SizeNA
Brand Flowtech
CARB (California) CompliantNo
Clearance CategoryExhaust
Collector Diameter2.50 inch
Collector Length10 inch
Discount Percentage26-50%
Emission Code4
EngineGM 90 Degree V6
Flange Thickness3/8 Inch
Header FinishNatural
Header StyleUpright
Inlet Port ShapeRound
Installed Height27 inch
Primary Tube Dia.1-5/8 inch
Primary Tube Length20 inch
Product TypeHeaders
Sale CategoryExhaust
Tube Material409 Stainless Steel
UPC090127072950
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number11586FLT
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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

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*Free Shipping & 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.