A lot of the exhaust systems are styled similarly due to the limited space of the underbody for each specific vehicle. The main point here is that, there is a reason why these exhaust sounds different from one another.
These are just some of the factors that may contribute in producing a different sound or tone.
Not all resonators are the same
Not all piping are the same
the material used are not the same
bends occurs in different places
The thickness of the pipes are not the same
The inner design of the mufflers are not the same
The dual chambers where not measure correctly to eliminate or reduce drone.
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