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Could any of you guys tell me if riding the Busa without the exhaust cans cause any harm to the engine out of curiosity!

Too broke for Akra!!
YEAH I believe you end up with burnt or warped valves...Johny Cheese will know for certain.. But I do know for sure that it isn't good for your motor, though it is supposed to sound pretty cool.
Loudness issues aside, the "loss" of backpressure might reduce low-RPM torque slightly but that same loss of backpressure has the potential of greater mid-to-high RPM power if the fuel/air ratios are remapped to accommodate the increased flow, in which case, the engine should be happy and unharmed. :tounge: