will a white brothers e-series silencer fit on the stock headpipe on a z-400? also i am looking for a cheap pipe that still gives some power and is loud, is this a good choice?

 

I have a new WB slip-on pipe on mine and it fits up good
The WB kit comes with the reducer for the stock head pipe too so dont worry
I have no endplate or discs in mine and its not that loud compared to others as it has a fairly long silencer instead
The other 'cheap' option may be an HMF pipe - loud and cheap and good apparently !