I am using a Bosch plug in my TGP I am trying to determine if this is a good plug to use or not. It is the non platinum set. The part number on it is 7571. It has that Cu-Electrode. Has anyone used this plug, and what kind of results has it yielded? :?

its is said that the best ones to use are GM but if you are not having any problems then it doesn't matter.  I got NGK.

this is a 100% answer as far as my TGP is concerned.  bosch platinum regular = fluctuating or irratic idle,  black smoke from exhaust when punched, plug tips black when i removed them boost cut at wot at certain rpms.   ---------> NGK TR5<----------- my hero  :wink: .  No more irratic idle, less boost lag,  no more boost cut (at all), max boost at wot without even a hint of stumbling :!:    

NGK rules!

NGK TR5's are nice.  Thats what I use.

Jason

Thanks guys,  :D I am going to pick up a set and try them this weekend