Description

Headers – LS Turbo Headers – 1.875 in Primary – 3 in Collector – Up and Forward – Gaskets Included – Stainless – Natural – GM LS-Series – Universal – Pair

Why Choose Us?



Frequently Asked Questions​

As an Authorized Automotive Retailer in the United States, we take pride in guaranteeing 100% authentic products from all brands available on our website. With partnerships spanning 1,000+ brands and a network of 20+ distributor warehouses nationwide, we maintain millions of auto parts in inventory across the USA, ensuring quick shipping and reliable service to our customers. When you shop with us, you're investing in quality and trust.
We believe we have the fastest backorder system in the U.S. auto parts industry, thanks to our strong partnerships with brands and vendors. Nearly all backordered auto parts are shipped directly by the vendors without any additional delays, or they are placed as special orders on the same day. In most cases, backordered parts are delivered within 5-10 days.
We offer unbeatable prices and the best shipping rates on auto parts, with exclusive protection and insurance included to safeguard your order from damage or loss. Enjoy convenient door-to-door delivery, real-time tracking, and our 100% satisfaction guarantee for a smooth, worry-free experience.
Our standard shipping typically takes 1-3 business days. We will provide estimated shipping time for each product. While we aim to deliver as quickly as possible, this timeframe ensures all orders are processed, prepared, and dispatched with care. If the products are not ready for shipping in 72 hours, we will refund you 100%
Absolutely. Once your order is dispatched, you’ll receive an email with tracking details, so you can follow your shipment every step of the way. Every step of shipping process will be sent through email notifications or using tracking page.
Every product page includes a stock level indicator to show what’s available. We always update the inventory 24/24. We’ll be happy to check availability and provide updates on new stock arrivals if you need a help.
We’re sorry to hear that your order wasn’t delivered in perfect condition. Please email us with your order number, a description of the issue, and photographs of the damaged item. Once we receive this information, we’ll arrange for a replacement or refund and handle the return process.
You can return items within 30 days of receipt. Ensure the product is new in its original packaging and securely wrapped for safe transit. Once we receive the item in sellable condition, we’ll issue a full refund for the product value. Contact us for the return address and further instructions.

About FLOWTECH

A division of Holley, Flowtech focuses on high-performance exhaust components. Their easy-to-install products range from headers and manifolds to mufflers to complete systems, all designed to give performance and audible gains all at a very affordable cost.

International Shipping

Below are estimated rates and delivery times for popular destinations; full carrier options are available at checkout.

Our dedicated team has years of experience managing international logistics and customs documentation to ensure smooth delivery from our US warehouse to your door. Please review our shipping policy and local import regulations before ordering.

Loading international estimates...

Reviews

There are no reviews yet.

Be the first to review “FLOWTECH LS 409ss Turbo Headers Up & Forward Style 11537FLT”

Your email address will not be published. Required fields are marked *

Recently viewed products

  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    MSD IGNITION 7500 RPM Module ASY17898

    SKU: MSDASY17898
    Product information
    • Weight0.01 lbs
    • Dimensions3.9 × 3.15 × 0.65 in
    • Quantity

      Each

    • Variant

      Yes

    • Rpm

      7500 RPM

    • Variant Group

      RPMChips1

    • Variant Column

      RPM

    Details...
    Original price was: $7.90.Current price is: $7.18.Add to cart
    Original price was: $7.90.Current price is: $7.18.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    QA1 Pro-Coil Front Shock Only (1) GS401

    SKU: QA1GS401
    Product information
    • Weight3.904 lbs
    • Dimensions19.5 × 4 × 4 in
    • Product Line

      401 GM Front Coil-Over Shock

    • Internal Design

      Twintube

    • Gas/Hydraulic

      Hydraulic

    • Threaded Body

      Yes

    • Recommended Spring Length

      10 in

    Details...
    Original price was: $303.00.Current price is: $274.95.Add to cart
    Original price was: $303.00.Current price is: $274.95.
    Quantity Only 7 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    MSD IGNITION 455 Buick Billet Dist 8517

    SKU: MSD8517
    Product information
    • Weight4.65 lbs
    • Dimensions19.1 × 6.9 × 6.8 in
    • Quantity

      Each

    • Product Line

      Pro-Billet

    • Trigger Style

      Magnetic

    • Advance Type

      Mechanical

    • Cap Style

      Male

    Details...
    Original price was: $660.00.Current price is: $599.95.Add to cart
    Original price was: $660.00.Current price is: $599.95.
    Quantity Only 2 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    QUICK FUEL TECHNOLOGY Nitrophyl Float – Notched 16-11QFT

    SKU: QFT16-11
    Product information
    • Weight0.06 lbs
    • Dimensions7.5 × 3.5 × 1.1 in
    • Quantity

      Each

    • Material

      Nitrophyl

    • Color

      Black

    • Finish

      Natural

    • Side Hung / Center Hung

      Center Hung

    Details...
    Original price was: $51.00.Current price is: $45.64.Add to cart
    Original price was: $51.00.Current price is: $45.64.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    QUICK FUEL TECHNOLOGY Side Pivot Float – Billet Conv. 34-2QFT

    SKU: QFT34-2
    Product information
    • Weight0.26 lbs
    • Dimensions9.05 × 7.35 × 1 in
    • Material

      Aluminum

    • Quantity

      Kit

    • Block / Plate

      Plate

    • Model

      4160

    • Primary / Secondary

      Secondary

    Details...
    Original price was: $94.00.Current price is: $84.55.Add to cart
    Original price was: $94.00.Current price is: $84.55.
    Quantity Only 3 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    SCRIBNER Utility Jug 3 Gallon – White 2020W

    SKU: SCR2020W
    Product information
    • Weight2.775 lbs
    • Dimensions16.1 × 9.7 × 9.6 in
    • Style

      Jug

    • Shape

      Square

    • Length

      9.5 in

    • Width

      9.5 in

    • Height

      16 in

    Details...
    Original price was: $38.57.Current price is: $32.14.Add to cart
    Original price was: $38.57.Current price is: $32.14.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    KYB SHOCKS Strut-Plus SR4265

    SKU: KYBSR4265
    Product information
    • Weight22.053 lbs
    • Dimensions29.5 × 9 × 9 in
    • Product Line

      Strut-Plus

    • Internal Design

      Twintube

    • Gas/Hydraulic

      Gas

    • Spring Included

      Yes

    • Spring Material

      Steel

    Details...
    Original price was: $207.05.Current price is: $188.23.Add to cart
    Original price was: $207.05.Current price is: $188.23.
    Quantity Only 5 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    SHARP ROCKERS Replacement Adjusters (4pk) 71620LK

    SKU: SHP71620LK
    Product information
    • Weight0.185 lbs
    • Dimensions3 × 2.5 × 0.85 in
    • Component

      Rocker Arm Adjusting Screw

    • Thread

      7/16-20 in

    • Mounting Style

      Screw-In

    • Length

      1.250 in

    • Cup Diameter

      5/16 in

    Details...
    Original price was: $83.46.Current price is: $75.87.Add to cart
    Original price was: $83.46.Current price is: $75.87.
    Quantity Only 9 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    SPAL ADVANCED TECHNOLOGIES 9in Puller Fan Paddle 755 CFM 30102061

    SKU: SPA30102061
    Product information
    • Weight5.735 lbs
    • Dimensions18.4 × 17.5 × 4.3 in
    • Puller/Pusher

      Puller

    • Voltage

      12V

    • Cfm

      755 cfm

    • Overall Height

      9.74 in

    • Overall Width

      9.74 in

    Details...
    Original price was: $196.00.Current price is: $178.14.Add to cart
    Original price was: $196.00.Current price is: $178.14.
    Quantity Only 4 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    KINSLER Main By-Pass Quick Disc. 3112

    SKU: KIN3112
    Product information
    • Weight0.115 lbs
    • Dimensions3.7 × 2.25 × 1.2 in
    • Material

      Aluminum

    • Color

      Gray

    • Finish

      Anodized

    • Quantity

      Each

    • Pressure

      2 psi

    Details...
    Original price was: $170.50.Current price is: $155.00.Add to cart
    Original price was: $170.50.Current price is: $155.00.Add to wishlist

    81