The Flowmaster 40 Series two chamber muffler is the original bad boy for street/strip cars. Made of 16 gauge, aluminized steel, the unique design cancels out noise, but makes big power.
Overall measurement is 19" long, 9-3/4" wide and 4" thick. Body alone is 13" long. Choose 2-1/4", 2-1/2" or 3" I.D. Centered outlet.