Originally Posted by Roddy1

I'm not an expert but I do know a person who is on their second 370Z. They just traded they "full bolt on" 09 for a 2013. His 09' had Headers, CBE, Test Pipes, G3 intakes, lightened flywheel, UpRev tune and Pulleys... he actually track races his car (autocross and 1/4 mile etc) and he says this time all he is doing is K&N drop ins with post MAF tubes, and test pipes. He said the rest of the mods were a lot of cash for not a whole lot of gains. He was neutral on the UpRev tune due to warranty.