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Flowtech Exhaust

Flowtech Upright Headers

Part # 11585FLT

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

Flowtech Upright Headers

In Stock
Free Shipping - Lower 48 US States
$238.95
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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
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 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
Bolts IncludedNo
Brand Flowtech Exhaust
California Proposition 65Yes
CARB (California) CompliantNo
Catalytic Converter Quantity0
CategoryExhaust
Collector AttachmentWeld-On
Collector Diameter2.50 IN
Collector Length10.00 IN
Collector Port Diameter2.50 IN
Collector Reducer IncludedNo
Collector Reducer Outlet DiameterN/A
ColorSilver
DesignUpright
Drive2WD
EGT PortNo
Emission Code4
EngineGM 90 Degree V6
FinishNatural
Flange Thickness0.375 IN
3/8 IN
Gasket Or Seal IncludedYes
Grade TypePerformance
Header SeriesFlowtech
Header StyleUpright
Installed Height27.00 IN
Material409 Stainless Steel
Mounting Hardware IncludedNo
Oxygen Sensor PortNo
Part TypeExhaust Header
Port ShapeRound
Primary Tube Length20 inch IN
Primary Tubing Diameter1 1/2 IN
1.50 IN
Product TypeHeaders
QuantitySold as a Pair
Sheen LevelSatin
Sub CategoryExhaust Manifolds
Tube Wall Thickness18 GU
UPC090127072943
Part Number11585FLT
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

*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
$238.95