The most aggressive-sounding street and strip muffler is now available in Stainless Steel! The 40 Series generates a powerful, aggressive sound outside the vehicle. If you are looking for the traditional ''Flowmaster sound,'' the 40 Series offers more of it than any other muffler. The 40 Series generates interior resonance within the vehicle as well, so if you want to really hear your exhaust system inside the vehicle as well as outside it, the Flowmaster 40 Series is for you.

409S stainless steel 40 Series mufflers are offered in a variety of inlet/outlet configurations and sizing from 2.25-inch to 3-inch as well as various single and dual outlets to fit a wide variety of applications. Flowmaster mufflers are finished with dark grey metallic paint to enhance their resistance to the elements. 2-Chamber mufflers feature a 4" x 9-3/4" x 13" case (19" overall length).