if I use a dual in dual out magnaflow would I need a X pipe still?

 

I'm pretty sure that most of the Magnaflow Dual in/out mufflers have an x-pipe built in so adding another one would probably not be needed. I considered running one of those mufflers a while back but haven't yet.

 

ive got one id consider selling if your interested that has the built in x-pipe. 18" case and 2.5" di/do. im wanting to go back with 2 single mufflers because i already have an x-pipe installed.

 

all of them have built in x pipes