DynoMax Ultra Flo Muffler - 6" Round x 16" - 21" Overall Length - 3-1/2" Inlet, 3-1/2" Outlet Ballast higher flowing intake ports

higher flowing intake ports

467 in Shaft

GM Fullsize SUV / Truck 1967-91

W insulation material 12 in

all necessary hardware and accessories are included for most common installations

DynoMax Ultra Flo Muffler - 6" Round x 16" - 21" Overall Length - 3-1/2" Inlet, 3-1/2" Outlet Ballast higher flowing intake portsDynoMax(R) Ultra Flo? Welded performance stainless steel mufflers feature 100 percent welded construction for lifelong durability. The unrestricted, straight through design dyno proven to flow up to 2, 000 SCFM and support up to 2, 000 horsepower. Each muffler uses our exclusive Continuous Roving Fiberglass (CRF) Technology to absorb unwanted interior resonance while maintaining a deep performance tone. The "Pure Unadulterated POWER" of DynoMax(R)