Wow, I posted something we the Buick community really needs to know, I guess it was to sensitive for someone. Mike T. at TA Performance Products has been working on his own Buick station wagon with some damn out right awesome heads. I do believe we should know about them in some sort of way not telling everything but a taste. Shot, his wagon is flyin for what it is.I would bet his heads would be competitive in X275. Mike T. Please elaborate on this. Your clientele is looking for help.