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    Sale!

    FlowTech Flowtech Upright Headers 11585FLT

    Vendor: FlowTech
    Part Number: 11585FLT
    Save $32
    Sale Price $249.95 Regular Price $281.95

    Available to order. In-stock orders typically ship in 1 to 2 business days.

    Not sure it fits your vehicle?
    Email sales@berryperformancesales.com with your year, make, model and engine, and we'll help you check fitment before you order.
    Fast Fulfillment: In-stock orders typically ship within 1 to 2 business days.
    Free Shipping on Orders Over $99 | Excludes freight shipments
    International Shipping Available: email sales@berryperformancesales.com for a quote.
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    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.


    FlowTech Flowtech Upright Headers 11585FLT


    Specifications:

    Brand Flowtech Exhaust
    California Proposition 65 Required Yes
    CARB (California) Compliant No
    Category Exhaust
    1895 Weld-On
    Collector Diameter 2.50
    Collector Length 10.00
    2877 2.50
    17 Silver
    Design Upright
    10091 No
    Emission Code 4
    Engine GM 90 Degree V6
    200 Natural
    Flange Thickness 3/8"
    710 0.3750
    353 Yes
    3390 Performance
    Header Finish Natural
    Header Style Upright
    Inlet Port Shape Round
    Installed Height 27.00
    10 409 Stainless Steel
    30 No
    2878 No
    part type Exhaust Header
    1905 Round
    Primary Tube Dia. 1-1/2 inch
    Primary Tube Length 20 inch
    10092 1.500
    Primary Tubing Diameter 1-1/2
    Product Type Headers
    1336 Satin
    Sub Category Exhaust Manifolds
    Tube Material 409 Stainless Steel
    Tube Wall Thickness 16
    Warning California Proposition 65
    Brand Flowtech Exhaust
    California Proposition 65 Required Yes
    CARB (California) Compliant No
    Category Exhaust
    1895 Weld-On
    Collector Diameter 2.50
    Collector Length 10.00
    2877 2.50
    17 Silver
    Design Upright
    10091 No
    Emission Code 4
    Engine GM 90 Degree V6
    200 Natural
    Flange Thickness 3/8"
    710 0.3750
    353 Yes
    3390 Performance
    Header Finish Natural
    Header Style Upright
    Inlet Port Shape Round
    Installed Height 27.00
    10 409 Stainless Steel
    30 No
    2878 No
    part type Exhaust Header
    1905 Round
    Primary Tube Dia. 1-1/2 inch
    Primary Tube Length 20 inch
    10092 1.500
    Primary Tubing Diameter 1-1/2
    Product Type Headers
    1336 Satin
    Sub Category Exhaust Manifolds
    Tube Material 409 Stainless Steel
    Tube Wall Thickness 16
    Warning California Proposition 65
    Description_ABR HDR GM 2.8-3
    Description_SHO HDR GM 2.8-3.4L V6
    Description_INV GM 2.8-3.4L V6 UPRIGHT HEADERS 1.5 IN
    Description_DES Flowtech Upright Headers
    Description_EXT 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
    Description_MKT 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.
    Description_FAB Mandrel bent tubes provide consistent tubing diameters for better exhaust pulse flow and improved performance
    Description_FAB 1-1/2 in. and 1-5/8 in. primary diameters available for increased exhaust flow and improved throttle response
    Description_FAB Heavy duty 16-gauge 409 Stainless Steel used for strength and durability
    Description_FAB 10 in. long, 2.5 in. collector improves exhaust flow
    Description_FAB 3/8 in. thick header flange for a leak-free seal and maximum strength
    Description_FAB Available for both round and D-port exhaust ports
    Description_FAB Header gaskets included
    Description_ABR HDR GM 2.8-3
    Description_SHO HDR GM 2.8-3.4L V6
    Description_INV GM 2.8-3.4L V6 UPRIGHT HEADERS 1.5 IN
    Description_DES Flowtech Upright Headers
    Description_EXT 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
    Description_MKT 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.
    Description_FAB Mandrel bent tubes provide consistent tubing diameters for better exhaust pulse flow and improved performance
    Description_FAB 1-1/2 in. and 1-5/8 in. primary diameters available for increased exhaust flow and improved throttle response
    Description_FAB Heavy duty 16-gauge 409 Stainless Steel used for strength and durability
    Description_FAB 10 in. long, 2.5 in. collector improves exhaust flow
    Description_FAB 3/8 in. thick header flange for a leak-free seal and maximum strength
    Description_FAB Available for both round and D-port exhaust ports
    Description_FAB Header gaskets included


    Shipping Policy
    • Free shipping on orders over $99 (excludes freight shipments).
    • In-stock orders typically ship within 1 to 2 business days. Weekend and holiday orders are processed the next business day.
    • Orders ship from Defiance, Ohio and a nationwide network of warehouses and manufacturers.
    • Items showing an ETA are not in stock yet. ETAs come from the manufacturer and can change.
    • No P.O. Boxes. International orders need a shipping quote, so email us first.

    Read the full Shipping Policy

    Return Policy
    • 30-day return window from the ship date. Returns must be approved first; email sales@berryperformancesales.com with your order number.
    • Items must be unused, complete and in the original packaging.
    • A 20% restocking fee applies, and return shipping is paid by the buyer.
    • Not returnable: installed or modified parts, opened or used programmers and tuners, custom orders, Open Box, and Clearance or Final Sale items.
    • Damaged, defective or incorrect items must be reported within 48 hours of delivery with photos.

    Read the full Return Policy

    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

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