Yes...The wife has the QS1 ( its the Quiet Series Pipe ) on her 2006 Foreman 500. It also is the forestry approved pipe. We got it at Leesons Motors. Shipped to the door for $219.00. This included the main jet and an aftermarket air filter. It is almost as quiet as the stock pipe...just a hair louder. You will be amazed. It still allows the extra air flow, without sacraficing the ear drums for more improved throttle and power.