Just got a 2001 eclipse spyder and looking to make it a little faster on the road so anyone know how to?

Its a 2001 eclipse spyder and im looking into a couple of things but i was wondering how much does it cost to put a cold air intake in. not the intake itself but the actual putting it in. as well as any other things i could do? thanks for the help. o yea and if you have any idea on prices of refurbishing the inside that would help too.