Aftermarket silencer with stock pipe?

UM I know the FMF Power Core II and Turbine Core II will fit the stock pipe. I think DG and some DMC silencers will fit.

But really its a waste of money to just buy a silencer. It will give you very very minimal power gains, and it sounds just like stock. My wifes blaster has a FMF Turbine Core II silencer and stock pipe on her blaster (bought it that way) and it sounds just like a stock blaster. The pipe is where that tinny 2 stroke sound comes from.
 
yeah like he said ^^ if you are gonna buy somthin, weather it be just the header or just the silencer, you deffinitly would want to go with the header, that is really where all the power is made in your exhaust, and you can get a used one fairly cheap.