Well I want to be the first to welcome you to 2gnt. Well basically you have two options when it comes to the Spyder. There is the turbo model (GS-T sypder) which has the same powerplant as the GSX which is the 2.0 dual overhead cam 4g63 turbo. But you also have the option of spending a little less cash and getting the non turbo spyder (GS spyder) which has the 4g64 which is a 2.4 single overhead cam non turbo. If you are going to spend the cash on an eclipse spyder. You should go ahead and get the turbo GS-T spyder. You'll be happy in the long run. Trust me!