Rhs Indy X Head Thread

ok, now the x pipe drag car thing go's hand in hand with the rule book and weather it's a driver or not [with sum exceptions] but mainly if the book says you have to run mufflers yet allows x pipes...I'd be running an x pipe, wouldn't you?

fwiw X pipes pick up the mid range torque, equalizes pulses bank to bank I believe.


Mufflers other than quieting the motor also create back pressure, back pressure helps make some torque below the power band of the cam/combo.

Most racers that I know don't race under the power band....
so, the mufflers you see on drag cars are the kind that lower decible with the LEAST amount of back pressure possible.