Kitty Cat Snowmobiles

Are there any performance difference among all the model years. In other words, is any type of stock engine faster than the other? Thanks!

I'm not aware of any differences in HP between Kawasaki and Suzuki/Spirit engines? Maybe someone else has the exact specs. But if you're looking for performance than you can do some simple mods. I know the deep snow kit is a huge improvement over the stock Kitty Cat when it comes to performance regardless of the engine and model year.

Thanks, I see the posts here about the deep snow kits, they look awesome. I wonder if any other simple and economical upgrades are available for better performance.