Originally Posted by Crucial Racing

Haha. You're sort of right and sort of not. It will be capable of being run (and purchased) as a shorty bolted up to the OEM midpipe/final cat pipe (or aftermarket replacement thereof) but it will be designed to be full length. You will not have to make a permanent decision between catless and catted. There will most definitely be an auxiliary O2 sensor bung.

Jeremy