I tried an after market fuel line for an MS260 it is not as pliable as OEM also it seems to be a bit longer so when you bend it to hook it to the carb it kinks this can and will limit the fuel going into the carb, the chineese oil line and impulse lines seem ok... I also used an after market clutch, air filter, and coil on the saw they seem to working well with no problems or issues and fit is good
I put a NWP top end kit on the 260 I have heard the meteor kits for the 260 are not that great with some sort of porting problem the NWP looks like decent machining it is chrome lined and it seems to be working real well I also got an NWP gasket/seal set I did not split the case so did not use that gasket but the seals, jug base gasket, and muffler gasket all fit good