a japcan is a large steel after market exhaust endcan usually seen on rubbish cars attemting the jap look of imprezas and other fast performance japanese cars. these have no noticeable power gain, if any thing they lose power and make lots of noise. usually purchased from motorworld or halfords.
5" slash japcan, 6" Rage japcan, Twin 5" Savage japcans.
by Ben Chandler September 13, 2007
One whom is both japanese and canadian
mike was the first to be called japcan.
by charles tucker May 05, 2005