CC 257 plenty of good mods for the big pig now. lightened flywheel ,tuner ,shaved heads ,hi flow manifold, carbon fiber reeds, reprogrammed computers, and the best for last SVS . HUGE UPGRADES IN THE MID RANGE WITH QUITE A BIT MORE TOP END. BUT I'M REALLY NOT SETTING MY BOAT UP FOR THE ALL MIGHTY TOP END . I'M ONLY SPINNING A 28 AT 6550 ,BUT IM ALSO MY OWN REV LIMITER ,IKNOW I'M PLAYING WITH FIRE REGARDING MY OIL SYSTEM BUT THAT'S THE PRICE IM GONNA HAVE TO PAY! YOUR BOAT TWINS OR A SINGLE ! TUNNEL T