The "Flowmaster Sound" is the true tone of American muscle and performance. Available in a wide range of domestic and import applications for automobiles and trucks. Dyno Tested, Race Proven™... But what really sets Flowmaster apart in the industry is the fact that we offer various sound levels from quiet and subdued to loud and aggressive, and all with the same performance and mileage gains you expect. No matter what your preference we've got a muffler for you! Don't settle for the one-style-fits-all approach that other "performance" mufflers offer. The different muffler series are listed below in descending order from quietest to loudest.
Available at $149.95
 The 50 Series Big Block Muffler is our largest and quietest muffler made for tow vehicles, full-size trucks, large SUV’s and RV’s / Motorhomes. This muffler is made for more than just big cubic inch engine applications and has a very large Resonance Tuning Chamber to almost completely reduce interior resonance in large cab vehicles and enough case volume to handle engines under heavy loads. Significant improvements in mileage, torque, and horsepower are to be expected from this muffler, as well as decreased engine heat and wear. Available in 16-gauge aluminized steel and fully MIG-welded for maximum durability. 5 Thick x 12" Wide x 22" Long with inlet/outlet sizes of 3" and 3.5". Click on image for sizes and full part number listing.
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Available from $132.95 to $135.95
 The 70 Series Big Block II Muffler uses a longer case for increased volume and added sound reduction that will still fit many applications that our wider 50 Series Big Block muffler won’t fit. It utilizes Flowmaster’s patented Delta Flow Technology for maximum efficiency and minimum interior resonance. The 70 Series mufflers are perfect for high performance street cars, most trucks, SUV’s, RVs and tow vehicles that require quiet operation with improved sound. Constructed of 16-gauge aluminized steel and fully MIG-welded for maximum durability. 5" Thick x 10" Wide x 22" Long with inlet/outlet sizes from 2.25" up to 3". Click on image for sizes and full part number listing.
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Available at $119.95 to $120.95
 The Flowmaster Super 50 Series (SUV) Muffler incorporates an increased case size with the technology from the 50 Series Delta Flow muffler. Made for all SUV’s and large displacement engine vehicles, the Super 50 Series larger case size allows for optimum exhaust flow, increased mileage, and reduced interior resonance. Also excellent for use on full-sized, high performance street cars looking to reduce interior resonance and tone levels for everyday driving. Constructed of 16-gauge aluminized steel and fully MIG-welded for maximum durability. 5" Thick x 10" Wide x 17" Long with inlet/outlet sizes from 2.25" up to 3". Click on image for sizes and full part number listing.
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Available at $119.95
 All 60 Series Mufflers feature Delta Flow Technology to increase horsepower and torque in most four and six cylinder vehicles. The 60 Series mufflers have shown significant improvements in mileage, helping to save fuel on many commuter vehicles, the mellow tone making for a pleasant and quiet driving experience. Just by adding a larger diameter tailpipe and Flowmaster stainless tip you can create a deeper tone overall inside and out. Constructed of 16-gauge aluminized steel and fully MIG-welded for maximum durability. 5" Thick x 10" Wide x 13" Long with inlet/outlet sizes of 2" and 2.25". Click on image for sizes and full part number listing.
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Available at $169.95
 The 50 Series Heavy Duty Muffler is appropriately named, a tough customer just like the trucks it was designed for. With 4.00” internal components and large case size, these mufflers help to significantly increase mileage, torque, and horsepower while greatly improving towing power and acceleration. The 50 Series Heavy Duty is great for all gas and diesel applications, and late-model trucks used in the most extreme working conditions. Constructed of 16-gauge aluminized steel and fully MIG-welded for maximum durability.5" Thick x 10" Wide x 18" Long with inlet/outlet sizes from 3" up to 4". Click on image for sizes and full part number listing.
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Available from $129.95 to $167.95
 The Hushpower HP-2 Performance Muffler is a real hot rod muffler that delivers all the required benefits of a high performance street and race muffler, yet is small enough for street rod applications. Built from either 409S or 304S stainless steel, this smooth, stylish muffler can be polished or coated for a great looking finish. The HP-2 muffler is designed for use with street rods, customs, lowriders and sport trucks or industrial applications where heat control and space are an issue. The HP-2 mufflers feature an innovative “Cool Shell” casing, a key feature in contributing to the muffler’s sound and heat control design. Advanced “flow” technology produces broadband sound cancellation for a rich ‘50’s tone. The HP-2 mufflers use a 4.00” X 5.50” X 18.00 CASE and can be ordered with inlet/outlet diameters including 2.00”, 2.25” and 2.50”. (Shorty models with a 12" long case are also available).
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Available from $92.95 to $119.95
 Greatly reduced interior resonance, smaller case size, and moderate exterior tone are just some of the benefits to the 50 Series Delta Flow Mufflers. With a specially designed Resonance Tuning Chamber, the 50 Series Delta Flow gives all the performance, while reducing the tone inside and outside of your vehicle. Simply stated, it delivers the same great performance from Flowmaster, without the increased sound. Available in Aluminized Steel or 409S Stainless for harsh weather applications, and both are fully MIG-welded for maximum durability. 4" Thick x 9.5" Wide x 17" Long with inlet/outlet sizes from 2" up to 3". Click on image for sizes and full part number listing.
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Available from $84.95 to $99.95
 Designed to minimize interior resonance, the 40 Series Delta Flow Muffler offers an aggressive exterior tone. The 40 Series Delta Flow helps increase torque and horsepower on many late-model performance cars and trucks. Available in Aluminized and 409S Stainless for harsh weather applications, both are fully MIG-welded for maximum durability. 4" Thick x 9.5" Wide x 13" Long with inlet/outlet sizes from 2" up to 3". Click on image for sizes and full part number listing.
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Available from $89.95 to $104.08
 The Super 40 Muffler was developed from our Top Ten race muffler lineup for use on the street and strip. Utilizing Delta Flow Technology, this muffler gives the best performance to higher horsepower vehicles. The Super 40 features a black, oversize case, which keeps the resonance down while the deep outside tone says it’s a Flowmaster! Constructed of 16-gauge aluminized steel and fully MIG-welded for maximum durability. 5" Thick x 10" Wide x 13.5" Long with inlet/outlet sizes from 2.25" up to 3". Click on image for sizes and full part number listing.
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Available from $61.95 to $79.95
 The muffler that started it all, the original 40 Series Muffler is an aggressive sounding street/strip muffler that delivers a powerful “Flowmaster Sound”. If you really want to hear your exhaust system – from both inside and outside of the vehicle, the 40 Series is for you. Available in either aluminized steel or 409S Stainless Steel and fully MIG welded for durability. 4" Thick x 9.5" Wide x 13" Long with inlet/outlet sizes from 2.25" up to 3". Click on image for full part number listing.
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Available from $79.95 to $89.95
 Flowmaster’s Super 44 Muffler uses the same Delta Flow Technology found in our larger Super 40 mufflers. The Super 44 delivers a powerful rich tone and is the most aggressive, deepest sounding, highest performing four-inch case street muffler we’ve eve built! Constructed from 16-guage aluminized or 409S Stainless Steel and fully MIG-welded for maximum durability. 4" Thick x 9.5" Wide x 13" Long with inlet/outlet sizes from 2" up to 3". Click on image for sizes and full part number listing.
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Available from $64.95 to $149.95
Because these mufflers are so aggressive, they are recommended only for off highway use and not for street driven vehicles
 Single Chamber mufflers. Intended for customers who desire the loudest and most aggressive sound they can find. Because these mufflers are so aggressive, they are recommended only for off highway use and not for street driven vehicles. These mufflers utilize the same patented Delta Flow technology that is found in Flowmaster’s other Super series mufflers to deliver maximum performance. Constructed of 16-gauge 409S stainless steel and fully MIG-welded for maximum durability.
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The original Flowmaster technology was born on the racetrack over 25 years ago to create a sound solution for Sprint cars racing at local California fairgrounds events. Flowmaster's patented new and innovative technology not only resolved the excessive sound issues of these high-powered race cars, but also allowed maximum horsepower with an increased and broader torque curve - an unheard of byproduct from competitive mufflers in use at the time. No other muffler company has dominated racetracks around the world like Flowmaster has in the past, present, or will in the future.
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Available from $135.95 to $249.95
 FOR USE ON RACE VEHICLES - NOT INTENDED FOR STREET USE
The 30 Series Race Mufflers are our most powerful & quietest professional race mufflers available and incorporate over 25 yrs of race proven research & development ensuring you get the best race silencers money can buy no matter what type of racing you do. They are available in 5.00” & 6.00” thick case sizes for maximum power and sound attenuation, and are available in numerous inlet & outlet tubing sizes ranging from 3.50”, 4.00”, 4.50” and 5.00” applications.
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Available at $126.95
 FOR USE ON RACE VEHICLES - NOT INTENDED FOR STREET USE
The 60 Series are some of the quietest mufflers we build. They are available in select sizes and were developed for spec classes & sportsman type race vehicles needing max dB attenuation. Select sizes are available with 3.00” and 3.50” inlets and outlets. These mufflers are recommended for race vehicles applications that have strict decibel level requirements to adhere to.
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Available from $147.95 to $195.95
 The Hushpower line of mufflers have applications in all forms of racing such as sprints & midgets, vintage racing, and diesel sled pullers. A key feature is its Cool Shell technology which minimizes the outside case temperature for mounting in and around body panels. Consistently proven to meet the strictest dB sound limits without affecting performance, they are available in several case configurations with inlet/outlet sizes from 2.00” through 5.00”.
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Available from $84.95 to $99.95
 FOR USE ON RACE VEHICLES - NOT INTENDED FOR STREET USE
The 40 Series Race Mufflers offer maximum performance with a substantial dB reduction over open headers. These are available in 3.00”, 4.00”, 5.00” & 6.00” thick case sizes. And with inlets & outlets ranging from 2.50” up to 5.00” sizes. The 40 series are available in numerous offsets for easy fitment & fabrication. Recommended for all racing applications where mufflers are required with a substantial decibel reduction over open headers.
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Available from $189.95 to $210.33
 FOR USE ON RACE VEHICLES - NOT INTENDED FOR STREET USE
Direct to header applications: The Scavenger Series Race Mufflers feature Flowmaster’s patented Delta Flow™ technology. Designed to attach directly to the exhaust header primary tubes, replacing the collector on sprint and drag racing applications. It can be used to retrofit existing race headers or used as the collector for custom fabricated race headers. It is ideal for limited space applications or race cars requiring mufflers with sound reduction.
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Available from $79.15 to $109.95
 FOR USE ON RACE VEHICLES - NOT INTENDED FOR STREET USE
The Flowmaster Outlaw Series Race Mufflers are our smallest and lightest race mufflers to date. When attached directly to the collector, it generally produces more power than open headers, while taking the “edge” off that open header sound. These race mufflers are designed to be used at race tracks requiring mufflers, but without dB restrictions. Available in two compact lengths and tubing diameter sizes including 3.00”, 3.50”, 4.00” and 5.00”. Recommended for racing applications where a race muffler is required, but without a set decibel limit to be met. Please call the Flowmaster tech-line with your specific dB requirements and applications.
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