mga sir,

i'm planning on some simple exhsaust upgrade on my 96 civic vti.
Gusto ko sana ung nd masyadong maingay on low RPM pero malagong but hinid punit and tunog on high rpm. Anung exhaust specifiactions pwede nyo mairecommend mga gurus. Mine is running on stock civic exhaust and pipes.


recommendations:
1. pipe diameter?
2. exhaust - straight flow? or muffled? anu ba pinagkaiba nung bilog lang at ung flat looking muffler body?

salamat mga sir