tranny yes if its a full swap, cat, illegal for anyone to sell u a use cat(in cali it is) besides, they're cheap and u can probably reuse ur old one or get a aftermarket one.

its up to u to let the insurance know or not, so if the unthinkable happens, u be cover, rates might go up, dunno, i never told my insurance co.

average price for b16a2 full swap(w/out install) goes for 2500-2800 give or take.

late