An empty cat is where you gut the cat by sticking a screw driver in it and gutting it they both do the same job but you would be better off saving your cat for the nct and get a decat
Welcome to the site dude. A de-cat
is a better job than a gutted cat
the gases flow better imo I had a
gutted cat before it does make a
nice difference all the same. As for
1.2 bar you should have an after
market mani or you'll fry piston
three you should get the fueling
set up too. Happy posting my man.