I was just wondering for the hell of it.
What is the highest hp you have seen on a turbo rotary that had a catalytic convertor on (id assume high flow)
And how far could you go safely?
Airpump would be operational of course (electric for space)
I really have no idea how restrictive a high flow cat would be.

 

I believe that carcrazy got 393rwhp with a main cat still intact with the HKS To4e kit..

 

If the cat is sized right it's not a restriction.

 

Rotary Performance made 400 rwhp or a little over with a T78 and highflow cat.