have both the 450 & 660. the 450 is "geared" lower than the 660
to compensate for the lower h.p. for hunting, trail riding, etc. the
450 is at least the equal of the 660. top end & high performance
is where the 660 shines,especially for those who like to modify &
dunes race.but as long as you stay with the stock size rims & no
more than 26" tires, the 450 is perfect for hunting. buy it & save
the $