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Flowmaster Crossmember back 409S - Dual Rear or Side Exit - Moderate/Aggressive Sound Chevrolet C/K 10 1967-1972
$949.95

If you're the proud owner of a 1967-1972 Chevrolet or GMC C10 or C15 1/2 ton 2WD truck with coil spring suspension, we've got something special for you! The American Thunder exhaust system is crafted just for your ride, delivering a sound that ranges from moderate to aggressive, both inside and out. This system features a cross-member back design, complete with a built-in H-pipe crossover, all made from high-quality, mandrel-bent 2.50-inch stainless steel tubing. Plus, it comes with a pair of Super 44 Series performance mufflers that really pack a punch!

You can choose how you want your tailpipes to exit—either dual out under the bumper for that bold, muscular look or dual out the sides behind the rear tires for a classic truck vibe. Installation is a breeze, thanks to the included hardware, and it's designed to fit both long and short wheelbases, whether you have an automatic or manual transmission. Worried about clearance? No problem! This system is perfect for vehicles that have been substantially lowered.

And the best part? It comes with a Lifetime Limited Warranty for your peace of mind. If you’re leaning towards aluminized steel instead, check out our optional system 17654, which offers a 3-year Limited Warranty. Just a quick note: exhaust tips and header reducer cones are not included.


Features:
  • Super 44 Series Mufflers for a deep, powerful sound
  • Mandrel-bent 16-gauge stainless steel tubing
  • Includes hangers and all necessary hardware for installation
  • Lifetime Limited Warranty
  • Moderate to aggressive exterior exhaust tone
  • Crossmember-back true dual exhaust system
  • H-pipe crossover for maximum power
  • Does not include header reducers
Specifications:
  • 2WD/4WD: RWD
  • California Proposition 65 Chemical Name: Chromium (hexavalent compounds)
  • California Proposition 65 Chemical Name: Nickel (Metallic)
  • California Proposition 65 Required: Yes
  • Emission Code: 3
  • Exhaust Series: American Thunder
  • Exit Position: Dual out rear / Dual out side
  • Heat Shield: No
  • Inlet Diameter (in): 2.5
  • Material: Stainless Steel
  • Muffler Part Number: Kit Only
  • Muffler Quantity: 2
  • Muffler Series: Super 44 Series
  • Outlet Diameter (in): 2.5
  • Product Type: Exhaust Systems / Kits
  • Single Dual: Dual
  • Sound Level: Moderate/Aggressive Sound
  • System Type: Header-back System
  • Tip Quantity: Not Included
  • Tubing Diameter (in): 2.5
  • Type of Exhaust: Header-Back
  • Warning: California Proposition 65
Notes:
  • Fits 1967-1972 Chevrolet and GMC C10, C15 1/2 Ton with V8 engines, 2-wheel drive short/long bed pickups. Coil spring suspension only.

Proposition 65

WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
1967-1972
Chevrolet C/K 10
1967-1972
GMC C/K 15

Flowmaster Banner

Who is Flowmaster?

Flowmaster is an aftermarket company that was founded in 1983. The company specializes in manufacturing high-performance exhaust systems for various vehicles. This includes classic muscle cars, modern sedans, trucks, jeeps, off-road vehicles, and more. 

It has since revolutionized the industry and has continued its tradition to produce high-quality exhaust parts. Today, Flowmaster has been the go-to brand of many car builders and enthusiasts worldwide and has been the market leader for years.

Pushing the Boundaries of Exhaust Design

Flowmaster has been the pioneer when it comes to developing mufflers. They produce mufflers that are quiet enough to be used legally on the streets but, at the same time, does not restrict the performance of the engine. This is why more and more people are choosing Flowmaster for their car builds as they can enjoy their vehicles on and off the streets.

An Exhaust For Any Style

The company provides its customers with the ability to choose the type of muffler they want. They offer five sound categories of their exhaust system, from quiet and discrete to something more aggressive and gives that racy sound. They can also choose between 12 designs of chambered mufflers, including their exclusively-designed “laminar-flow” muffler or “straight-through.”They also have a custom-built exhaust system for that one-of car builds.

Passionate Development Team

Flowmaster is composed of people who have years of experience in developing quality exhaust systems. Using the knowledge they acquired over the years, they improved their designs and matched it with the ever-growing technological advancement of vehicles today. 

Tried and Tested

With hundreds of installs under its belt, Flowmaster has proven itself to be a brand that delivers what it promised. In addition, all their exhaust systems are designed and dyno-tested, ensuring that they can maximize your vehicle’s performance once installed. 

Purchase Flowmaster at Vivid Racing

If you are in the market for an upgrade in your vehicle’s exhaust that would provide you with that distinct sound and improved performance, then Flowmaster is the brand for you. To know more about Flowmaster, visit Vivid Racing and check out their list of products that fit your requirement.




LIMITED WARRANTY:

This catalytic converter is warranted to be free from defects in materials andworkmanship subject to the exclusion and conditions set forth below and subject to the durational limits in this paragraph. This catalytic converter has been designed and manufactured and is warranted to meet federal Environmental Protection Agency emission requirements for 25,000 miles. The stainless steel body and the nipples alone are warranted for 5 years or 50,000 miles, whichever comesfirst. At the conclusion of the 5 year/50,000 mile or 25,000 mile period, whichever is applicable, all liability under this limited warranty shall terminate.

For full warranty information Click Here
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Sale price None
Wholesale price $784.66
Shipping Weight: 94.70
Length: 49
Width: 14
Height: 25
Product Added At Monday 19 March, 2018
Product Modified At Wednesday 06 August, 2025
Imported By EPICF
Last Edited By vendordata@vividracing.com
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Holley Performance Products Inc. $664.97 $1,068.95 ? $949.95 ? 2025-08-06 14:33:17

Manufacturer Direct Shipping
This item is available for direct shipping from the manufacturer. Please verify stock availability with the manufacturer. Once confirmed, you can place an order through [Meyer Distributing], who will arrange for dropshipping from the manufacturer directly to our customer.

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