Hi everyone,
Like the title says I'm kind of confused as to what o2 housing to go with. I just picked up a JMFab o2 dump which I believe is 2.5 inches. Currently on the cat I have the ATP o2 housing which is 3imches all the way. Which one do you guys think I should run with my bbk full turbo? Here are some pictures. Thanks in advance for your help.
On the car right now

Thinking about putting on my car

 

02 dump hands down. It'll reduce back pressure by not recirculating the exhaust. This will help free up spool which in turns increases torque, hp, and reduce knock

 

Open dump!

 

If you don't like your car to be overly loud, go with the regular o2 housing. YouTube Evo o2 dump and see if that's a sound you could handle.

 

So 2.5 inch should work just as good as a 3 inch?

 

An O2 dump is only loud when the wategate is open. Otherwise the car will sound normal for whatever catback is on it.

 

It really comes down to personal preference. Open dump on a daily driver will end up getting old after awhile. If you are looking for performance advantage..then open dump is the choice.

Good luck