I was at the Nissan Dealer yesterday to have my rear spoiler attached. I was then talking to oneof the mechanics about cone filters and if they really make a difference with increasing Hp and speed of course. He said unless you change your exhaust into a less restrictive one like Nismo exhaust for example there will be no increae in HP because there is stil restriction in the factory exhaust. It makes sense. Any thoughts on this? Also he said Nismo will be coming with a lot of aftermarkets for the 370z soon
