If you already have another muffler on your bike, but need the rest of the parts to get it's full potential out, then no problem. This Kits for you. It gives you all you need. Easier starting, far less overheating, much stronger response and accelerationand you can finally get the extra 10 hp from your 2020-21 500 or 501 XCF-W or FE model bike. This has theFuel adders, intake tube to get rid of the reeds, Grunt Exhaust Manifold exhaust manifold, Fuel Rail, high flow 90-Degree Fuel Fitting for all Tanks and the Large Capacity quick Disconnect Fuel Filter.
 
These are for USA and CANADA spec BIKES ONLY. EUROPEAN and AUSTRALIAN bikes use the kits for your bikes please