It seems every time I buy a new car I immediatly begin to moddify it. From my old 94 Monte Carlo, then my 00 Mustang, then the 02 Subaru WRX (in which i pumped the little wagon up to 280 HP in turn causing much pain to my tranny). I recently bought my 07 Grand Prix GXP and told myself i would not do anything to this car. SOOO a full cat back and short ram air latter i find myself doing the same old thing (LOL). I figured this time i would limit myself to no more than 350hp. Now this limit has turned intoa goal. I am looking for any other simple modifications to put on my LS4. I have been unable to find anything but the ram air and cat back (magnaflow). I hear rumors of a throttle body upgrade available but have been unsuccessfull in my search. Does anybody know any other simple upgrades that are out there?? I am tempted to install a Squire Turbo on it but I am terrified of it sucking up a ton of water or somthing bumping the filter and sucking up trash.

any suggetions would be loved!

 

Check out the latest 2010 subaru wrx you might get some new ideas for modification.