Hi chrisgcombi, I think it is a better idea if you are going to check your xr3i in a professional mechanic. We all know there are some that are better on checking their own cars. However, if you really want to make sure that the performance car parts are in still in good condition you'd better take them there. More so, if you want to know some knowledge in tuning you may also ask your mechanic for some information that he wants to share.