Below are pictures of a single exhaust outlet from Top Secret. I found it interesting how they patced up the opposite side outlet so that there wouldn't be a gap there.

 

Another:

 

eh...i'll stick with dual setup. Looks more menacing.

 

Its good performance wise, but the dual is soooooooo much better looking, id rather wait for a really nice dual ....

 

The diameter on that exhaust pipe is HUGE! Looks like at least 3"!

 

Looks like a Fart Pipe to me

 

The only real nice "lookin" Dual I've seen so far is the Veilside teardrop,..that is the ****,..but I'm kinda use to seeing MK IV Supra's w/ that big daddy HKS or Apex'i stickin out,...especially how it comes out side ways!!! I normally hate that sidewasy ****(on Civic's etc,.) too,..but on the Supra,..Its badass!

Might see better gains w/ one exit tip instead of a split dual,...just like Supra,..its a Y-pipe that joins before the Muffler I think?

But not so sure,..have to see some Dyno's and its still way to early!