NOT GETTING INVOLVED IN THE PERSONAL ATTACKS I LIKE THE RESULTS OF ADDING THE 555"S TO MY 110. YES THERE WAS A LOSS OF LOW END TORQUE BELOW 2500 RPM WHICH IS WHAT MR. WOODS TOLD ME WOULD HAPPEN UNLESS I UPPED THE COMPRESSION WHICH I DID NOT. SO AT 9.3 - 1 ITS NOT AS SNAPPY IN THE 1500 - 2500 RPM RANGE BUT ABOVE THAT RPM THE MOTOR PRODUCES SUBSTANTIALLY MORE TORQUE AND HORSEPOWER OVER THE 255. IT FEELS EVEN PEAKIER NOW BECAUSE THE OUT PUT ABOVE 2500 RPM RISES DRAMATICALLY ESPECIALLY OVER 4500 RPM. IF YOU WANT A TORQUE MONSTER MOTOR BELOW 3000 RPM LEAVE THE 255 ALONE. THE COMBINATION I HAVE IS VERY NICE AND I DO NOT REGRET DOING IT. THE POWER CHAMBER DUALS, K&N AIR FILTER AND THE JACK POT MUFFLERS ARE A GREAT COMBO. THE KNOWLEDGE THAT I COULD GET BACK ALOT OF THE MISSING LOW END TORQUE WITH A 10.5 PISTON IS COMFORTING TO KNOW. HOPEFULLY THE WEATHER WILL COOPERATE AND I CAN SOME DYNO TIME FOR SPECIFICS AS I DID BEFORE MAKING ANY CHANGES. ILL KEEP YOU POSTED.