my 2000 mazda mpv sounds like a motorboat. louder as i accelerate. on 2000 Mazda MPV

my mechanic says it is a crack in the rear exhaust manifold where it joins the catalytic converter. cost $1100 to replace. does this sound right?

by in Newport News, VA on January 30, 2013
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1 answer
ANSWER by , January 30, 2013
yes the manifold and catt are combined on this model. if its cast steel maybe it could be w/ muffler shop