Hi, J. C.
the 1/5 F-16 taipipe for the K-210 or P200 are 37 inches correctly (without the bell mouth and bypass), but the tailpipe for the P-300 is 33 inches .,
please confirm that which turbine did you use ? if we sent the wrong size of tailpipe to you. please e mail to John, we can send the new tailpipe to you as soon,