The THS curved pipe is nowhere near as loud as the Trinity pipe. It is louder than a stock pipe, but that is expected with a higher flow exhaust.

The pipes Tex has are the Sirio Big Bore pipe and the Fantom pipe. Both of them are great pipes as well.

This is the THS pipe I was talking about:
THS Curved Pipe for Max trucks

The RD Logics pipe is the same pipe.