LOOK! I love HONDA and enjoy working on them but these are not Muscle Cars and will not sound like them. The engine will only take as much air as the combustion chamber will accept and then what the exhaust will put out. If you modify your exhaust from front to back and then increse the cyl volume maybe at that time you can say single or dual? You dont mention any other modifications so a single will deliver more than what your engine can take in!!! If its a diff sound you are after work with the exhaust. GOOD LUCK!
