How to add HP to a car for ?

Question

I already have a K&N air filter and a K&N cold air intake on my 2007 350z, but I want to boost my HP more. is there any other ways that don't cost a much as exhaust( borla exhaust costs about 1000$) or a turbocharger?

Answer 1

A computer chip or programmer such as Venom, from Auto Anything, $300.  Then you're staying with 91 octane, right?

If talking exhaust, just take a look at Aero, you might get hooked, and simply buy the inexpensive muffler.

Answer 2

try a magna flow or bassani exhaust, shoudl be about half the cost.  (i found 588 at autoanything.com)

chip is good.

try synthetics in the motor and trans.  usually frees up 3-5%  more power each.  (reduced friction)