The stock Polaris RZR-S comes with Fox Racing coilovers that work really well - better than any other stock side-by-side shock on the market. Paired up next to the new 2.0's you can notice longer springs, upgraded machinery, and nicer looks. The biggest physical difference between the stock shock and the new 2.0 is size of the shock. The 2-inch shock has a 58-percent larger piston area as well as more surface area, larger oil volume and a larger reservoir volume. This means that Fox can generate more damping force without risking overheating or shock fade. The biggest difference is the adjustability.