SKU: 12580292087

Flowtech Upright Headers - 11585FLT

Sale price$112.47 Regular price$124.97
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 19 - Jul 24

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Description

Flowtech Upright Headers - 11585FLTOverview: 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

Overview:

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

Application:

  • Universal

Specs:

Brand Flowtech
California Proposition 65 Chemical Name Chromium (hexavalent compounds)
California Proposition 65 Chemical Name Nickel (Metallic)
California Proposition 65 Required Yes
CARB (California) Compliant No
Collector Diameter 2.50 inch
Collector Length 10 inch
Emission Code 4
Engine Chevrolet V6
Flange Thickness 3/8 Inch
Header Finish Natural
Header Style Upright
Inlet Port Shape Round
Installed Height 27 inch
Primary Tube Dia. 1-1/2 inch
Primary Tube Length 20 inch
Product Type Headers
Tube Material 409 Stainless Steel
Warning California Proposition 65
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 12580292087

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Maribel de Oleo
Los Angeles, US
★★★★★ 5
SNEAKERS OF THE GREAT MATERIAL
Size: 9, Color: White/Black/White
THE SNEAKERS ARE CONFORTABLE AND REALLY GOOD MATERIAL FOR THE ALL USE.
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Reviewed in the United States on February 25, 2026
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David Robles
Chelsea, US
★★★★★ 5
Love them!!!
Size: 8, Color: Black/White/Black
Great!!!!
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Reviewed in the United States on May 6, 2026
D
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David F.
New York, US
★★★★★ 5
Great looking shoes. Can’t beat Cole Hahn
Size: 11.5, Color: Optic White/Navy Blazer/Optic White
Great looking shoes and very comfortable. I had to go down 1/2 a size from 12 to 11 1/2. I would recommend them 💯%.
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Reviewed in the United States on June 6, 2026
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Orlando A.
Massapequa, US
★★★★★ 5
Excelente producto
Size: 8.5, Color: Navy Blazer/British Tan/Ivory
Las tallas pueden ser muy pequeñas par la talla real puede ser la orma del zapato
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Reviewed in the United States on May 23, 2026
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Verified Purchase
Clinton
Carnegie, US
★★★★★ 5
Fit
Size: 10.5, Color: Optic White/Navy Blazer/Optic White
Fits snug and looks good
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026

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