Was reading EVO mag earlier and it says that on the MTM upgrade there is a butterfly flap inside the exhaust which open ups further up the rev range.
Is this one that will open at say 3000rpm to make exhaust straight thru and retain some back pressure below to aid low down torque or am i barking up the wrong tree?
does it have any other benefits?
Greg
Is this one that will open at say 3000rpm to make exhaust straight thru and retain some back pressure below to aid low down torque or am i barking up the wrong tree?
does it have any other benefits?
Greg
Comment