DynoMax® - Ultra Flo™ Polished Stainless Steel Muffler

51 review / Item # sp4402
DynoMax® - Ultra Flo™ Polished Stainless Steel Direct Fit Muffler
DynoMax® - Ultra Flo™ Polished Stainless Steel Direct Fit MufflerDynoMax® - Ultra Flo™ Polished Stainless Steel MufflerDynoMax® - Ultra Flo™ Polished Stainless Steel MufflerDynoMax® - Ultra Flo™ Polished Stainless Steel Direct Fit MufflerDynomax® - CatalogDynomax® - Types of MufflersDynomax® - WarrantyDynomax® - FAQDynoMax® - Ultra Flo™ Polished Stainless Steel Muffler SoundDynoMax® - Performance Exhaust PromoMade In USADynomax Authorized Dealer
$72.98 - $340.72
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DynoMax Exhaust Systems

Ultra Flo™ Polished Stainless Steel Muffler by DynoMax®. This muffler packs straight-through design for unrestricted exhaust flow and a dyno-proven increase in power inside a polished stainless steel shell that delivers a show quality shine. It maintains a deep throaty tone while absorbing undesirable interior resonance.

Dynomax Muffler SoundsDynomax F.A.Q.Dynomax Warranty


  • Unrestricted, straight-through design for a dyno-proven increase in horsepower and torque
  • Engineered to give your car a deep performance tone
  • Stainless steel construction for lifelong protection
  • Polished finish for a mirror-like shine
  • CRF (Continuous Roving Fiberglass) technology absorbs unwanted interior resonance
  • Dyno proven to flow up to 2,000 SCFM and support up to 1,900 horsepower
  • Covered by a Limited Lifetime Warranty and 90-Day Performance & Sound Guarantee

The stainless steel Ultra Flo Polished muffler will give your car a powerful throaty tone while dampening unwanted interior resonance thanks to CRF (Continuous Roving Fiberglass) technology. It is manufactured from stainless steel to provide corrosion resistance and lifelong durability and is polished for a brilliant, show-like shine. The muffler's straight-through construction with a perforated tube inside allows for proper sound absorption while ensuring the free flow of exhaust gases and reduced back pressure. Improved, unrestricted flow is one of the most important factors in gaining horsepower and torque. The Ultra Flo Polished Muffler is covered by a limited lifetime warranty and 90-day Performance & Sound Guarantee to make sure it fully meets your expectations.

DynoMax, a member of the Tenneco conglomerate that also includes well-known names such as Walker, Monroe, Kinetic, etc., is one of the leading North American manufacturers of performance exhaust products. Built on over 25 years of market leadership, it centers on engineering and launching new systems that feature a quality sound, ultimate performance, and long-lasting durability - everything expected from premium exhaust component. The DynoMax Performance Exhaust product line, consisting of a wide variety of mufflers, pipes, and exhaust systems, was first introduced by Walker in 1987. Driven by the theme "Pure, Unadulterated Power," the brand is committed to creating groundbreaking products that reveal the true nature of any vehicle.

Warranty Information

Find out everything you need to know about the product warranty

90-day risk-free trial offer

Try qualifying DynoMax® products* for 90 days. We guarantee you'll experience the DynoMax® performance difference! If, for any reason, the qualifying products* don't live up to your expectations within the first 90 days, replace the products and we will refund your original product's purchase price (which shall not exceed the manufacturer’s suggested retail price), plus labor (up to $50 per exhaust system). We're that confident you will be satisfied with DynoMax® performance products!

*Offer limited to the purchase of DynoMax® Stainless Steel Cat-Back Systems and Ultra Flo™ SS Polished, Ultra Flo™ Welded, DynoMax® VT® or Super Turbo™ performance muffler. This offer does not include products which have been modified, improperly applied or installed on vehicles used for commercial or racing purposes. Valid only on vehicles used for private, non-commercial use and may be withdrawn at any time.

Limited Lifetime Warranty Qualifying Products

DynoMax® Ultra Flo™ SS Polished Mufflers

DynoMax® Ultra Flo™ Welded Mufflers

DynoMax® VT® Mufflers

DynoMax® Super Turbo™ Mufflers

DynoMax® Stainless Steel Systems (38XXX and 39XXX Series)

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

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DynoMax® - Ultra Flo™ Polished Stainless Steel Direct Fit Muffler
DynoMax® - Ultra Flo™ Polished Stainless Steel Muffler
Average Rating: 4.8 of 5
4.8 of 5
Polished Muffler
Instead of my stock one I installed this muffler and now it sounds much more aggressive. It is expensive a little, but quality is well worth it.
APosted by (St Paul, MN) /
1994 Chevy CK Pickup
Was this review helpful for you? Yes
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