Originally Posted by
mrjenrst
Tbh i've not even worked on a vtec, never mind seeing a cut down back box
But depending on the severity of the leak its debatable weather or not it would produce NOTICABLE difference in power.
there is a difference between a leak and a hole,,,, most exhausts require 500 miles to run in so the carbon seals up the small holes hence they can sound louder at first ( we are talking oem here ) if blows didnt affect fuel economy why would a blowing exhaust fail a MOT and why would a blowing exhaust mess with the emissions so much