Exhuast question, dp size Options

[mikecelica]

hey i was just wondering instead of going and making a custom downpipe for my 7afte. Can i use the downpipe i used with my header (before i had turbo). Because im planning on having 2.5" piping and the dp is probly 2". Would it matter much, it would make things alot easier, then all i need is a flange to match the turbo for the top of the dp and one to match the exhaust pipe. any info? thanks

[pabel89]

how will your stock downpipe fit your turbo, thier to diffrent things. you have to go to a muffler shop with your turbo on the car , tow it to the muffler shop so they can put it on the car. and im not sure but i think your exhaust should be bigger then your downpipe so the turbo can breath right,also look threw my thread like old ones these guys told me everything. they were a bit harsh but it was for my own good i have a good setup with no prblems yet thanks to them. look threw the old threads with my name in force induction its all on thier.