M Michael New member May 16, 2010 #1 ...4 into 1, and why? I have a 1990 kawasaki zx11.And i would like to know witch muzzy exhaust would give the most horsepower, two slip on mufflers are the complete aftermarket exhaust system. Also witch is the louder of the two?
...4 into 1, and why? I have a 1990 kawasaki zx11.And i would like to know witch muzzy exhaust would give the most horsepower, two slip on mufflers are the complete aftermarket exhaust system. Also witch is the louder of the two?
