Question About Header and Test Pipe

[infinitiI35man]

I Have a Infiniti i35 which is similar to the altima and Maxima.. Would Headers for an Altima VQ35DE Or Maxima VQ35DE fit on my i35??? And about how much more power am I going to gain?? What about with just a Test pipe??? any Suggestions???

[allensteiner]

a test pipe is not street legal in most states and you will not pass an emission inspection - but there will be a small hp gain.

headers or any other vq35 parts won't give you any gains because that's what you have under your hood already. i think i read somewhere that a 3" inner diameter exhaust makes hp gains but can't remember anymore.