Spintechs mufflers with supercharged 4.6L = awesomeness.
The pipes are just loosely fitted in the two videos below that are spliced together and the passenger side muffler did fall off after I hit 5,000 rpm on the second segment, but still, they sound great. These mufflers will sound different with every engine. I just want to throw that out there so that i dont get blamed at a later date for a 302, 351, etc. with spinteches not sounding the same as my car. My engine will sound far different than a 351W etc. due to the different pulse of the valvetrain. Remember, this engine has 4 cams not 1.
The sound quality isnt great in the video and the fuel pump that came with the MTF aluminum fuel tank is way too loud, but the exhaust and engine do sound incredible in person when the mufflers aren't falling off and I step back from the interior to get away from the whine of the pump. If the fuel pump is still that loud after installing the divider panel, etc. then i will probably need to change it out. With that said, it still gives you an idea of the sound and i personally like it. It is quiet at idle and cruising rpm, but really aggressive under hard acceleration.
Click picture to play