so i just finished installing the catless perrin downpipe, i kinda spaced on buying new gaskets when i had the chance so i made my first mistake by replacing those which im doing tommorow morning.
it bolted up to the turbo just fine and was totally flush.

heres the problem... it didnt want to connect to my Cobb Cat-back.
with some pushing and pulling i was able to get the two to come close but they would not flush with each other... Is it just the fact that it's a cobb cat-back and a perrin downpipe?

 

as long as its not the JDM one

you should be fine i mean they are made to hook up to stock stuff