OEM 08+ RN SJ on left. Impros 10/16 on right.
My ski is a 2011:
ported, b pipe, worx intake, 195 psi, reed stuffers and spacer, pro tec ignition, zero flywheel, bored carbs, prok filters. The OEM impeller hit so hard down low it was difficult to ride at 1/2 throttle. Felt like a light...