im running a old Mariner in my x2. i thought the performance was good and it is load as hell , but i split the rubber hose off the pipe into the water box yesterday and rideing with out the hood on it felt the ski had another 10 horse power so im thinking the Mariner is still restrictive . just as a experament im going to run with out the water box on wed night just to see how much diffrent it is just have to invest in some ear plugs frist
yep the westcoast is still the best...with rear exhaust it is tolerable...I'm going to try no waterbox and inline westcaost muffler next year with rear exhaust...one more ride and the yellow x2 meets it's maker...
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