got some questions on exhaust and throttle body
 

yea i am wondering if u can put true dual exhaust on a 2002 and if any one has done it i also was wondering if anyone is using throttle body spacers and how well the work

Both these subjects have been discussed many, many times here. If you will browse the forums or use the 'search' function you will get plenty of answers.
*Thread Closed*

Search around a bit. Both are topics which have been discussed a few times. Search terms like "throttlebody+spacer" or "throttle+body+spacer" will get you the skinny on that. For dual exhaust, "dual+exhaust" or "cat+back+exhaust", etc will turn up threads.

IMO, both are a waste.

A single exhaust can be built to flow the same or even better than a dual setup. Most people oversize dual exhaust pipes to the point that it actually causes the exhaust gases to cool & slow, not flowing as well as a properly designed setup. Besides, without internal engine mods, these engines do not like high RPMs. They lack high RPM breathing capabilities.

A throttle body spacer on an engine that already is producing 90% of peak torque almost immediately off idle is also a waste. TB spacers work by increasing the volume of air between the cylinders and the throttle blade. This will effectively shift the RPM which peak torque occurs lower in the RPM range by shifting the whole torque curve, but it also has an affect on high RPM HP (HP is a function of torque and RPM). In short, they do not work well on this engine. Your money would be best spent in other areas (cold air intake, tuned PCM, headers, etc).

*EDIT* - Whoops... Looks like I was typing while Rich was closing the thread. Oh well.