Originally Posted by
mugenb46
i got nothin on that, maybe MM can chime in on that, maybe a Pro Tunned version.

the PT stands for PRO TURBO if you go to the GO web site you can see this in the part # for the gen 5 egines it is also engraved on the head of the gen 5engines ie 5PT 7PT etc etc
http://go-engine.com/products.htm
the P series engines run standard plugs and the PT series engines run turbo plugs
hope this helps to clear up some of the confusion
Adrian