whats up guys.

ok, so i've done some exhaust mods recently. custom 2.25 straight thru b-pipe and 2.25 carsound cat. i love the look and tone of my greddy sp but i'm thinking maybe soon i wanna pick up a 5zigen fireball axle-back.

questions is will it bolt up to my greddy sp c-pipe? i know mods can be made if it doesn't but i'm just wondering if they'll bolt up. that way i could do it myself.

also, i should've took this into consideration earlier, but i want a jdm header now. would using that with a 2.25 cat and exhaust be pointless?

thanks guys.