Cat and CAI performance Question

[SiX]

I'm in the process of buying myself a skyline, the car that i'm after produces around 220rwkw @ 18psi. The exhaust system is around 3 1/4 inches all the way through with a split dump pipe, the downer about it is that it still has the standard cat.

Would a 7ltr cat make much difference and what kind of a power increase would i be looking at?

Also looking at a UAS CAI box, could i expect much of an increase from installing one?

Thanks in advanced

[Guest Robo's]

Of course the Cat would make a difference. The cat is immediately restricting the rest of your system.

[SiX]

haha, i know it will make a differect. All i'm asking is would it make a big difference concidering thats a major bottleneck in this set up. e.g 20rwkw increase?