I had the same break on my RTV X900. 200 hours and 1100 miles. I'm not sure how Kubota thinks that a press fit will last. Mine broke then vibrated so much it broke the aluminum casting of the muffler bracket on the transmission. Kubota said I must have backed into something even though I had call the dealer to let them know about the break at the manifold flange. Not only that - there is no damage to the rear of the muffler, tail pipe and rear muffler bracket. Kubota finally agreed to pay for a welding repair to the exhaust flange and transmission bracket. All is good now. Otherwise I love my machine and it gets used everyday for work. I've had it for 9 months.