Everything you need to replace crankshaft and pistons
I purchased to install on my 2004 Polaris Switchback 600. This was a new model year sled and these guys made sure that I got the correct Crankshaft and pistons for my sled. Came with all the gaskets needed. Not sure it came with a thermostat gasket but I did not have to take mine off for install. Installed in my sled and took it out the following weekend and put 200 miles on the machine and ran flawlessly. It is a good idea to send as much info as you can about your year and model so they can send you correct parts because of different configurations in model years. About the only other things you will need is your tools and assembly lube. I would recommend this product and will be using these guys for other parts in the future.