What would happen if I put a high flow loud muffler in place of my catalytic converter, but kept my stock muffler on?
1987 2.8 v6 fiero gt. has stock muffler with a straight pipe in place of the catalytic converter. Will adding a loud high flow muffler (so it will be similar to the straight pipe) make it sound good, if i keep my stock muffler on. So technically id have two mufflers, but the one in place of the cat will be high flow so it should be good. Yes or no? Bad or good idea?