Product DescriptionStage 1 Kit RB200 Real Tree RT200 212Improve the performance of your minibike with this kit.This simple bolt-on kit gives a noticeable power increase and that throaty off-road sound you want.Kit includes the followingHeader with gasketMini91 Slip-On Muffler with Stainless ClampAutoLite 3910x Racing Spark Plug.037″ Main JetBillet Air Filter AdapterK&N Style Air FilterChoke Hold Bracket and ScrewHeavy Filter Side Carb GasketNOTE: Not all carburetors have bowls or main jets that are easily removed. If your bike has one of these carbs, you may want to get the Stage 2 kit that includes a new Non-EPA style carb that offers additional tuning over the stock emissions carbThe air filter must be oiled to be effective. We recommend K&N Air Filter Oil available at most auto parts stores