KNOCK OFF FLOW MASTER 40 series STYLE MUFFLERS BRAND NEW $45 EACH.INCREASE YOUR LOW END TORQUE WITH 1 OF THESE MUFFLERS.THESE FLOWMASTER STYLE MUFFLERS WILL INCREASE YOUR TAKE OFF POWER BY USING DELTA FLOW TECHNOLOGY SCAVANGING EXHAUST PRINCIPLES TO INCREASE HORSEPOWER AND TORQUE.2 1/4" AND 2 1/2" OFFSET INLET AND CENTER OUTLET WILL FIT MOST NEWER FORD TRUCKS.3" CENTER INLET AND OFFSET OUTLET WILL FIT MOST NEWER GMC/CHEVY TRUCKS.2 1/4" OFFSET INLET AND OUTLET WILL FIT OLDER FORD MUSTANG GT.2 1/2" AND 3" OFFSET INLET AND OUTLET WILL FIT NEWER FORD MUSTANG GT.CENTER IN DUAL OUT MUFFLERS ARE $49 EACH.Looking for the most aggressive sound in the Flowmaster muffler line? Then take a look at these 40 series Flowmaster mufflers. Designed for use on street and strip vehicles, they take the sound waves produced in the exhaust, and cancel them against angled baffles built into the muffler case. This improves both horsepower and fuel economy. Best of all, these Flowmaster mufflers allow you to hear that cool Flowmaster tone inside of the vehicle, as well as outside of it. So, if you want more power and less noise, then you've gotta get these Flowmaster mufflers. 4" Thick x 9.5" Wide x 13" Long WITH 2 1/4", 2 1/2" AND 3" INLETS AND OUTLETS.my 2 chamber mufflers sound identical to these mufflers in the videos below