This single Silencer set up would flow way better than the TORS CAT Delete, when you look at the "U" turn that the exhaust has to make to get to both R/H side Silencers.
The fact that the TORS CAT Delete is way less restrictive than the stock box it will of coarse perform better, but not as much as a proper free flowing system.
We set this one up with a PCV&AT with a base map from Hanso, so it will set itself to suit the way the rider rides.
A "good" dyno operator would set it up easily enough, the problem is getting a "good" dyno operator that actually does know what he is doing.
The term "back pressure" falls into the same category as "triple chrome plated" there's no such thing as "back pressure"
As I often say, when looking at an exhaust system, imagine you are sitting on your bike on the inside of the pipe at the head, now give it full throttle.
How many times do you have to slow down, change directions or make a "U" turn ?
Take the stock header for example, the center and rear cylinders hit a major "T" intersection shortly after leaving the head :-( the front cylinder is O.K. (once the exhaust has gotten past the casting at the head)