I realized my 91 F22 has a dual pipe header that Y's into one pipe. Is it at all wise or advantageous to run a dual pipe exhaust? At the very least could it give my baby a new, unique sound? (not an extensive fart can sound either)

 

No. Simply put, keep it single muffler style.

 

okay wasn't sure. i just like the looks of the dual exhaust on the V6's. Almost like faking someone out. lol

 

Good for looks, bad for performance.

 

LOL very well put finch. LOL but seriously i was also thinking of something like that and discovered it would be a major decline in performance. One guy dyno'd his car with single exhaust and then he went and converted it to dual exhaust and went on ahead and dyno'd it again and saw that he lost about 23 horses.OUCH so no thank you. if you want that dual exhaust look,my advice is sell your accord and get the same with the V6 or drop a V6 into it lmaoNOW if you don't care for performance then go ahead!also he noticed that his MPG dropped by 4.

 

A single has proved to be a better choice for performance on the S2000 even though they come with dual.

 

a single of what diameter? Im getting a 3" for my turbo accord...

 

3" is pretty much standard for turboed cars. 2.25-2.5" is pretty much standrad for NA cars. NA cars w/ 3" lose power (backpressure)

 

yeah... which piping should I get?

 

Definitely not recommended.
It will reduce the back pressure and cause you to lose torque.
The last thing Hondas need is a loss of torque