vrsexhaust.com. get a piping kit in whatever diameter you wish(aluminized is cheaper) for a 2g gst application.
whatever muffler you desire, and get a 3 foot long resonator from magnaflow

i actually got a 7" outer diameter 3" inner magnaflow straight through muffler from summit, and had it welded in after the downpipe.
so its literaly like i have two mufflers.

the sound now is exquisite.