Wössner pistons feature a unique PTFE coating on the skirts and a grade of 4032 Alloy (T6) which allows the engine builder to run a closer piston to bore tolerance then he might do on another make of piston. This helps remove the slapping noise during cold start, common place among engines running forged pistons due to larger then OE bore clearances.The crowns of the pistons are also polished to better resist detonation on a high performance engine. Polishing allows a more even spread of heat inside the chamber. Image is a Stock image. Any Items That Are Out Of Stock Or have Extended Lead Times, May Take Slightly Longer Than Normal. The item "Wossner FORD 2.0 Pinto OHC 8V Non Turbo NA 91mm Long Rod Forged Pistons Set" is in sale since Saturday, December 7, 2019. This item is in the category "Vehicle Parts & Accessories\Car Parts\Engines & Engine Parts\Pistons, Rods & Parts". The seller is "shopbhp" and is located in Sevenoaks, Kent. This item can be shipped worldwide.