DG Performance's RCM Steel Exhaust - with Headpipe for Kawasaki's 1995-2004 Lakota 300. The RCM stands for Reverse Cone Megaphone. The midpipe starts at a specific diameter and gets larger as it gets to the muffler body. This helps scavenge exhaust gases from the engine. This increased scavenging process will give your ATV better throttle response and a smoother power delivery. You won't find a better RCM Steel Exhaust for your Kawasaki.