Beretta.net

I am looking for a muffler with good air flow on a 90 Beretta

Got a Quietflow on the Cavy and it's very quiet(no change in performance). Like the Magnaflow on the Beretta(much better than "stock" and there was a gain).
As for dual outlet there is no marked effect on flow. Sound does change a little. Tips have an effect on sound too.

For a single pipe exhaust it is best to have it as simple as possible. Keeping the pressure waves as one and never splitting them at anytime. Keep in mind the waves do travel back down the pipe. That is how the exhaust gets pulled out, other than just being pushed out.

i got one of the walker quietflow's on my grand am when i was trying to quiet the cammed engine down so they wouldn't complain when i went to get an inspection sticker..

not a bad muffler and would suit your needs

Do you have any preference as to how you'd like the car to sound?

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