If I get the CT headers will it void my warrenty &
what else will give me a large HP increase. I was thinking the INGEN intake , CT headers, GReddy EVO. Ill probley be at 300, right?

 

No Comptech parts will void your warrantee. Try doing a search on this topic and you will find a ton of info.

 

Mods cannot void your warranty unless the modification itself causes the problem. For example, if you install an intake and you suck up water and kill your engine, I doubt it will be covered. This policy does vary from dealer to dealer as some dealers will try to blame mods for problems, so you should make sure your dealer is cool with mods before you go nuts.

As for the upgrades, Headers will get you about 30hp peak, intake about 5-7hp, and exhaust 1-3hp. That's 300hp total at the highest number if you add them together.

The problem with that is that gains from modifications are not cummulative. If you add headers and an intake, assuming the above numbers, you WON'T get 35-37hp... you may only see 33 or so. Mods don't always work together so you can't add them together. People with all of the mods you listed, plus things like pulleys, etc, have done dynos and still aren't over 300hp. The only sure way to get over 300hp is to add the supercharger when it comes out. With all of the mods you listed you'd probably be in the 290hp area... and that's peak HP as the headers only get you around 15-17hp in the mid-range (below 4800RPM), so you would really be only averaging in the 280's below 4800rpms.....

 

Good info juniorbean