For the V35 the Invidia Gemini is the way to go for a quiet exhaust with little drone! If it isn't loud enough for you, you can always get hi-flow cats and aftermarket headers later on.
If its for the V35 as stated it'll be a direct bolt on and if it is for a 350z a 8" Extension pipe is needed. Check out ebay for deals for the exhaust my V35 friend got that exact exhaust for $1,300 after some coupon codes on ebay.