Yes, it is the Atom engine (Hartley).
2012 Ariel Atom V8 500 - Top Speed
"The V8 is actually derived from mating two Suzuki Hayabusa engines, featuring specifications usually reserved for the track rather than the road. They include a flat-plane crank, dry sump lubrication, forged internals, individual throttle bodies with sequential injection, and a 10,500RPM rev limit! All of this translates into 500HP and 284lbft at 7750RPM – staggering considering the size of the thing."
But if 500hp is not enough...
Jack Frost (Holeshot racing) assembled a mock turbo version of the engine. The small Garrett turbos shown are adaquate for 650 hp at mild boost levels.
