[SR5NEWBIE]

I bought a flowmaster 70 series and had a local muffer shop run the pipes for me. All to gether it cost me 270.00. This is a very quiet muffler. Barely louder than stock. A little torque gain if you squint one eye and concentrate.

If you are looking for loud, get a different muffler. last I looked those TRD kits started at 600.00 and went up from there. There is a far better deal to be had, unless you don't mind spending the money. Either way, that TRD set up is not going to run any better than mine.

Like all after market accessories, there is a lot of argument about just how much power this exhaust kit adds. Generally speaking, after market exhausts by themselves offer little in the way of additional power. Typically, the most you’ll see is a 3-5 hp gain with just about any cat-back system. The TRD kit is no exception — our tests show that the TRD Dual Exhaust for the new Tundra added anywhere from 1 to 5 hp. Unfortunately, the increase in horsepower varied quite a bit depending upon RPM. That’s why we like that “3-5hp” number. Check out the dyno performance graph below.