What for running my air filter2.25 or 2.5
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What for running my air filter
I would try to find at least a 2" waterbox from a HX or something of the sort. Maybe even a stock RN superjet waterbox. A stock 2" X-2 box is rare and hard to find but your choking the motor downsizing to the stock size.
No DO NOT remove the waterbox. Even a aftermarket westcoast box has small inlet/outlets (1 7/8") You need to increase the diameter and size of the exhaust hose and change out that waterbox.