PERFORMANCE STREET MUFFLERS
Flowmaster is a name you can trust. Flowmasters have a signature sound that is the true tone of American muscle and performance. They are available in a wide range of domestic and import applications for your truck.
Dyno Tested, Race ProvenTM... But what really sets Flowmaster apart in the industry is the fact that they offer various sound levels from quiet and subdued to loud and aggressive, and all with the same performance and mileage gains you would expect.
Below is a list of Flowmaster mufflers available for your truck to fit your needs (from quietest to loudest).
50 SERIES BIG BLOCK - 3 CHAMBER MUFFLERS
The 50 Series Big Block Muffler is the 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 nearly reduce all 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".

70 SERIES BIG BLOCK II- 3 CHAMBER MUFFLERS
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 the 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".

Super 50 (SUV) - 3 Chamber Mufflers
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".

50 Series HD - 3 Chamber Mufflers
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".

50 Series Delta Flow - 3 Chamber Mufflers
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".

40 Series Delta Flow - 2 Chamber Mufflers
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".
