Flowmaster Super 40 Delta Flow Muffler

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  • Deep powerful tone muffler
  • Reduced internal resonance
  • Unrestricted exhaust flow
  • Large chamber design
  • Manufacturer's warranty
  • Made in the USA

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  • The quietest muffler in the Flowmaster 40-series with a deep but powerful drone
  • Reduced internal drone for a more enjoyable ride
  • Unrestricted exhaust flow for improved engine performance and horsepower
  • Suitable for large trucks and vehicles with large exhaust volumes
  • Black painted finish to prevent corrosion and adds a classic OE look
  • Fully MIG welded for additional strength to make it more durable
  • Choose between stainless and aluminized steel
  • Flowmaster's guarantee of exceptional quality and performance
  • Proudly made in the USA with local resources, labor and techology

Deep Powerful Tone Muffler

The Flowmaster 40 delta flow muffler is the quietest in the Flowmaster 40 series. It uses sophisticated Gen II delta flow technology to improve your vehicle's performance. It has a single center outlet and a single offset inlet for optimum exhaust flow and boosted engine performance.

Reduced Internal Resonance

The muffler absorbs internal resonance to reduce interior drones. This makes the inside of your vehicle quieter for a more peaceful ride.

Unrestricted Exhaust Flow

With an unrestricted flow of exhaust gases, your engine functions at optimal capacity to give the best it can. This means improving your engine's horsepower, saving up on gas mileage, and maintaining a healthier engine.

Large Chamber Design

The Flowmaster 40 delta flow muffler features a large chamber design to handle large exhaust volumes and emissions from powerful engines. The muffler is particularly ideal for heavy-duty vehicles with large exhaust volumes.

Black Painted Finish

It has a black painted finish that looks great with any vehicle exterior. The coat also prevents scratches and corrosion to boost the muffler's durability.

Fully MIG Welded

The mufflers are MIG welded for durability. Every inch is carefully crafted for strength to last years in all road and weather elements.

Available in Stainless and Aluminized Steel

They are available in both stainless steel and aluminized steel. Both mufflers are durable and tough, and your choice will depend on the needs of your exhaust system.

Manufacturer's Warranty

Flowmaster provides a limited lifetime warranty for the stainless steel muffler and a 3-year warranty for the one made from aluminized steel. It is a guarantee that the muffler is worth your money in all aspects, including quality, craftsmanship, and performance. If you need any help or further information about your warranty, feel free to get in touch with PartCatalog.

Made in the USA

Your muffler is proudly made in the USA using local materials, technology, and labor. Your purchase helps to create jobs for thousands of Americans every year.

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Lifetime Limited Warranty applies to Flowmaster stainless steel mufflers (excluding FlowFX series).
Three (3) Year Limited Warranty applies to Flowmaster aluminized steel mufflers.
The following part numbers are available in this product line:
To purchase this product for your vehicle, please select the Year, Make and Model of your vehicle at the top of this page.

Chevrolet (1960-2016)

Avalanche, Avalanche 1500, Blazer, C10, C10 Pickup, C10 Suburban, C1500, C1500 Suburban, C20, C20 Pickup, C2500, C30, C3500, Chevelle, El Camino, K10, K10 Pickup, K10 Suburban, K1500, K20, K20 Pickup, K2500, K30, K3500, K5 Blazer, Monte Carlo, R10, R10 Suburban, R1500 Suburban, R20, R20 Suburban, R2500, R2500 Suburban, R3500, Silverado 1500, Silverado 1500 Classic, Silverado 2500 HD, Silverado 3500, SSR, Suburban 1500, Tahoe, V10 Suburban, V20, V3500

Chrysler (2005-2013)

300, Aspen

Dodge (1965-2013)

Challenger, Charger, Coronet, D100, D150, D200, D250, D300, D350, Dakota, Durango, Magnum, Ram 1500, Ram 2500, Ram 3500, W100, W150, W250, W350

Ford (1987-2016)

Escape, Excursion, Expedition, F-150, F-250, F-250 HD, F-250 Super Duty, F-350, F-350 Super Duty, Mustang

GMC (1973-2016)

C15/C1500 Pickup, C1500, C1500 Suburban, C2500, C3500, Jimmy, K15, K15/K1500 Pickup, K1500, K2500, K3500, R1500, R2500, R3500, Sierra 1500, Sierra 1500 Classic, Sierra 2500 HD, Sierra 3500, Sierra 3500 HD, V3500, Yukon, Yukon XL 1500

Lincoln (2003-2010)


Nissan (2004-2007)

Armada, Pathfinder Armada

Plymouth (1970-1974)

Barracuda, Cuda

Ram (2011-2015)

1500, 2500, 3500

Toyota (2000-2006)

Tacoma, Tundra