American Turbine,Dominator,Legend products (all represented by us) are by far the finest quality money can buy ,Aluminum is fine for under 500 hp
re pulling the impeller ,avoid applying heat at all costs ,once you remove the nut , a good jaw puller should do the trick , if you need to "borrow" or buy the "capture" type puller we use we can make arrangments to loan you one or sell it to you . Please let us know if we can help you ,check PMs cell number for the weekend Tom