As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A REJECTED TAKEOFF. PILOT DETERMINED THAT THE RT ENGINE WAS NOT MAKING MANIFOLD PRESSURE OR RPM. AFTER RETURNING, IT WAS DISCOVERED THAT THE RT EXHAUST PIPE WAS BROKEN AT THE FLANGE. THE PIPE WAS REPLACED AND THE AIRCRAFT INSPECTED FOR EXHAUST DAMAGE. THE PLANE WAS RUNUP AFTER THE REPAIR AND OPERATIONS CHECK WAS NORMAL.