Um. Deep and loud compared to what? Its not possible to make a 4cyl sound like an 8, not even a 6. When you hear a 4cyl, you know its a 4cyl, same thing when u hear a 6 or an 8 with aftermarket exhaust. My Camaro has been mistaken for a V8 more than once at idle, but as soon as I get past 3500...