I'm considering building up an NA 13B with street port and other bolt ons. This will be my daily beater so not too much money invested into this, since the TII has more needs. For the exhaust I want to run RB header thena single straight pipe to a muffler. So basically im just looking for a single muffler that sounds pretty good i guess, but most importantly isnt too loud with that setup.

 

The A'PEXi GT-Spec is supposed to be an excellent muffler. It's the biggest and quietest single muffler I can really think of.