Hyway 49mm Pop Up Piston Kit For Stihl MS391 Chainsaw – Performance Upgrade

If you're rebuilding the top end on your Stihl MS391 chainsaw, or maybe you want to bump up the compression a little for more grunt, this Hyway piston kit is a solid choice.

It's a 49mm 'pop up' style piston, which means it's designed to raise the compression ratio a bit compared to a standard flat-top.

This kit includes the piston itself, rings, and the wrist pin clip—everything you need for that cylinder.

It's made by Hyway, who are known for making good aftermarket parts.

This is a brand new, single piston kit.

Just make sure your cylinder is in good shape, or you're using a compatible 49mm cylinder, and you can get that saw running better than ever.