I was wondering if anyone has used or seen psi's modblaster triple pipes i have a mod zrt800 and was wondering about the sound level and performance of em. Also can i use the stock silencer or is one included with pipes cause it doesn't say at psi's web site.

I have used them and was very pleased with them. I used the stage II modblaster pipes on a zert 600. The stage I pipes work with your stock silencer, and the stage II comes with their own silencers to save a little weight and give you a couple extra ponies. Sound level with the stage II pipes and silencer wasn't much louder than stock at idle, but at WOT you could tell it had pipes. I gave it more of a muscle car sounds as opposed to a crotch rocket sound....

yeah thats what i'm looken for hehehe thanks

If you get them I'm sure you will be VERY pleased with them. I haven't heard one compaint from anyone about the PSI pipes, and I sure don't have any! haha :D