Gren Ville
FORGED VS CAST PISTONS AND PISTON COATINGS EXPLAINED

Wossner ford 2.0 pinto ohc 8v non turbo na 91.25mm forged pistons & pec rods set polishing allows a more even spread of heat inside the chamber which will help prevent hot spots on piston crowns. This helps remove the slapping noise during cold start, common place among engines running forged pistons due to larger then OE bore clearances.