If you need to meet 0.3% CO demands what system do you need? I saw somewhere on the forum that you can add this system to a BEC, but howmuch does it cost? Also howmuch does a CAT cost?

There's no universal answer. It depends on what engine you're running, what ECU etc etc... Cats can be had for 50-60 quid new on Ebay but if you don't have a lamda sensor and flood it, it'll knacker it bigtime!

It's a carbed Fireblade.

I had one that had lambda and controller when i went to SVA, the whole system cost me £300 and was very easy to sey up. I got it from fisher sportscars so contact them as they may still sell them.

Best of luck Pete