Originally Posted by iamwhutiam003
With that pulley your going to have Knock, it will drop timing and lower your hp making your car slower then you would like. If you plan on a pulley drop you need a scanner, or more preferable a tuner. Mod until you have 0* of kr and then you can start dropping pulleys. Also most people start with a 3.5" [down from the stock 3.8"].
If you get the zzp cat back exhaust it deletes the ubend so you dont need the u bend delete also.
On top of that i would recommend autolite 104 spark plugs, they may have to be replaced a bit more then ngk but our cars highly prefer autolite copper plugs.
With all that minus the pulley you will be making around 190 to the wheels. [this is an estimate no way to know for sure without a dyno]
Look at my second post on this thread for beginning modification recommendations.
http://www.grandprixforums.net/f18/h...ions-6957.html
