o2 housing bigger than dpipe

[EclipticalGS]

i got a open dump o2 housing it bolts up to the turbo and downpipe flange but the housings downpipe flange outlet hole is 2-3/4 id and the downpipe is hole is 2-1/2 so should i get a 3" dpipe??

 

[portnpolish97]

thats a no brainer, of course you should get a 3" DP. What brand DP are you using now.

 

[EclipticalGS]

well the dp is stock but the rest of exhaust is 3-1/4". is the pipe hole portable?? i could match it