Check these out... According to Tom Nelson -

"The 572's make 2000 hp 1300hp on 91 octane this is a full street engine that can be driven everyday they will idle at 800 rpm and make 17 inch's of vacumn at idle.Peak power is at 6000 rpm The 509's make 1870hp 1190 hp on pump gas

The base cost including intercooler,management,ignition,wiring,fuel pumps basically everything you need to install minus piping from turbos to cooler is 36000.00 for the 509 tt 42000.00 for the 572tt if you want it black add 500 dollars to the cost"