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Millennium Big Bore Cylinder Kit

Any tuning required? I have a 2015 sportsman 570 sp touring and I'm running a big gun fuel programmer and mbrp exhaust will installing the 625cc kit give me issues with my mods?

By Gcorey82

I have a 2015 sportsman 570 sp touring and I'm running a big gun fuel programmer and mbrp exhaust will installing the 625cc kit give me issues with my mods? Will I have to get the ecu tuned?