I have a 2003 Z i put a exhaust system and cold air intake on it. I'm wondering what i could do it for some hp gain without supercharging it and turboing it? Any suggestions or have anything for sale to do this? I dont really want to spend a fortune either

 

headers, plenum spacer, could upgrade the ecu. idk man NA mods don't really produce that much horsepower even if you have all the bolt ons possible

 

Nitrous wouldn't be too bad either.

 

IBTL! You won't get very big gains without spending a pretty penny. Save your cash and the trouble and either save for the turbo or work on your suspension/brakes/visual

 

OMG.

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Driving skill, do a driver mod. Works pretty well.