I just bought this carb off a member here on KR. I just got the K&N filter yesterday 11-25-09 and it has never been ran. I tuned the carbs without the filter installed only because I didn't have one. The crossover intake I made myself and I will guarantee they will not fail under normal uses. I ran this carb on my stock internal kfx700 with every bolt-on. Ran very strong all the way through. $280 shipped firm for everything or $245 shipped for carb and filter only add 3% when using paypal. Only reason for selling is because I'm going with a 38mm carb with my 730 build.