intake/exhaust

So I'm thinking about buying a used 1995 BMW 325i and I know a friend who has a mid 90's 325(not sure of model/year exactly) and he has an exhaust system on it that sounds great.

My question is, what is the best sounding (going for deep tone) system for the price, as well as the intake systems. Im new to BMW's and I'm just researching for now.

Thanks

Why dont you ask your friend and get the one he has if you like it so much?

becuase im in florida until next week...i cant exactly ask him when im 2000 miles away...i would prefer not to wait bcuz if i find out now i can start looking online for prices...thats why