Can anyone help me?

[Drifter SSX 13]

I was thinking about buying the URAS RS exhaust featured in the group buy, however, I have read that the muffler is somewhat small. Does anyone have any measurements on the canister in comparision to the BLITZ nurspec or the hks hiper? Also, any pics comparing it to either exhaust or of the URAS exhaust on an S13? I'd also like to hear from anyone that has had experience with this exhaust and what you think of it. I have searched, but came up w/ no real useful information. I would greatly appreciate any info you all have to offer.
Thank you