IT HAS A 502 MAG EFI. I HAD A K&N FILTER PUT ON A SET OF ROLLER ROCKERS AND STAINLESS MARINE MANIFOLD WITH THE POLISHED STAINLESS STEEL RISERS. I HAVE SEEN 73 ON THE SPEEDO WITH THE 3 BLADE 23P MIRAGE HITTING THE REV LIMITER. I JUST GOT MY 4 BLADE B1 BACK FROM THE MERC LAB AND HAVE ONLY HAD IT OUT ONCE. I WAS SEEING 68ISH BUT I HAD 3/4 TANK OF FUEL AND 6 PEOPLE ON BOARD TURNING ABOUT 4800RPM. I NEEDED A TUNE-UP WHICH WAS DONE THIS WEEK SO I AM HOPING TO SEE OVER 70 ON THE SPEEDO AGAIN WITH THE B1 4 BLADER. THE B1 MAY BE A LITTLE SLOWER OVERALL BUT MIDRANGE CRUISE IS MUCH BETTER. I CRUISE AT 57-58 AT 4000 RPM. FROM THE ONE TIME I TOOK A GPS OUT ON THE BOAT BEFORE THE NEW MOTOR WENT IN MY SPEEDO WAS 2-3 MPH OPTIMISTIC. NOT BAD FOR A BOAT SPEEDO. ANYWAY I AM REALLY HAPPY WITH THE BOAT. DROPPED TWO 10'S AND 2 400 WATT CLARION AMPS IN IT, PUT SOME BEZELS AROUND THE CLEATS, ANODIZED CUP HOLDERS, A NEW MOMO WHEEL THAT MATCHES THE BEZELS AND ORDERED THE RED LAYIN CARPET WITH A BIG PURPLE BAJA LOGO DOWN THE MIDDLE BETWEEN THE FRONT SEATS. I'LL GET SOME MORE PICS ONE DAY. I WOULD LIKE TO PUT THE DIAMOND DECK FENDERS AND SOME ALUMINUM MAGS ON THE TRAILER AS WELL. MY TRAILER IS JUST PLAIN UGLY!!!!! LONG REPLY BUY HEY WHAT THE HECK. SURE WOULD LOVE TO HIT THE LOTTERY AND BUY THIS 40 OUTLAW W575'S AND THE FULL LEVEL TWO CUSTOM FROM THE FACTORY. ANYBODY HAVE THE RIGHT 6 NUMBERS FOR THE FLORIDA LOTTERY TOMORROW?