Wossner Forged Pistons for 2.5 TFSI EA855 EVOWossner Forged pistons made in Germany for VW 2. 5 TFSI EA855 EVO engines. Machined from 4032 T6 aluminium alloy, with high silicone content for low thermal expansion. This allows for tighter piston to bore clearance which makes them perfect for street use. The factory pistons are the weakest point of the 2. 5 TFSI Engine so upgrading to Wossner forged pistons, ensures vastly improved reliability and engine strength. The kit includes forged pistons,
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