the aa impeller will pull your rpm's down about 400 or 500 a bigger impeller isn't always better, take a dremel tool and cut the ring out at 45 deg angle so your can get the whole ring be careful not to cut the housing and put the new one in the freezer for a day and get the housing warm it will make the ring go in alittle easier, make sure you cut the liner close as possible
later
Pro Mod