Wiseco Stihl MS661 used tester piston READ BEFORE ORDERING

We used this to test the original Wiseco in an OEM Stihl MS661 bore, we ran one tank and realized the Stihl plating is shitty.  This piston is perfectly usable and will come with your choice of new NPR 1mm ring.. WHEN YOU ORDER LET ME KNOW WHAT BRAND CYLINDER YOU WILL BE USING SO I SEND YOU THE RIGHT RING.