Nah no catback as they are too expensive for a good one and a twin 2.5 isn't big enough.
I'd like to make it hard for myself and make a 4 inch exhaust in my driveway/workbench with an angle grinder, a drop saw, a bunch of straight pipe and bends/donuts, a muffler (or 2), a resonator, some flanges and stick it all together with a $200 gasless mig from bunnings. Either that or I'll get lazy and do nothing which is better than 50/50.
I will fork out for valve springs and a 4 inch intake though and make a battery relocation kit.
It won't be any time soon cos the missus is already mad about me buying stuff.