If you are looking for a quality forged piston to suit your BA BF FG turbo then this is the piston for you. The Mahle power pack piston is made from 4032 alloy and is suitable for boost levels up to 25 psi. I have seen guys running as high as 30 psi with no problem although this is not recommended. This piston is known for low noise or engine rattle. The piston is std compression ratio. Each kit comes with 6 x pistons, 6 x pins, 12 x c clips with a full set of piston rings included. The pistons are available in three sizes, STD, .003 th and .020 th. Select size when ordering. 000108592