When putting on an exhaust system is there different exhaust torque specs depending on make of exhaust ex Bassani any different from H-D pipes.I was told the H-D torque specs are universal Vance&Hines has the same specs as H-D.ReasonI am asking I run Bassani Pro Streets had to take them off when my mechanic put them back on he said they were over torqued they were around 150lbs .He re torqued to H-D specs around 114lbs saying it is all universal and that he runs Vance & Hines and the torque is the same.Do you agree? thx