Okay, we got the HX55 today, opened it up and low and behold... ... we're gonna need some kind of adapter to mount it to the existing 12 valve exhaust manifold. Also, it looks like we're gonna have to do some searching for an outlet elbow to tie into the intercooler tubing. And lastly, the exhaust size is a bit large. Anyone have any ideas... those who have already done it. Joe Donnelly?