I installed this piston the day after I got it into a mildly scored cylinder which gave me 135psi and milled six 10' sections of large oak. The saw was bouncing out of tune for a bit but it finally settled in after the first couple tanks of fuel. The piston seemed of good quality. I just need a good cylinder now to make it perfect.
Hyway Husqvarna/Partner K950 piston kit 56mm 
