All Things Mk5 > Performance Modifications

Which bcs downpipe?

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Liamedition30:
Just after abit of advise, booked in at bcs with nige yesterday for downpipe and decat but still unsure about either 3" or 3.5". The car is stage 1 now with all the parts to go stage 2 after the downpipe. What's people's opinions?

DANBOY66:
stock turbo 3" bigger than k04 3.5"

CarlW:
Any particular reason why not to put 3.5" on a standard K03 GTI just out of interest as i'm trying to understand more about the exhaust side of things before i make a decision on what i'd like to do myself in the near future.

DANBOY66:
from what i have experienced there is no point in the extra cost for next to no gain

my car made fantastic figures on 3" with sports cat (bcs) i did not see hardly any improvement fitting a 3.5" decat

Paradox1:
Wouldnt it flow better if the whole exhuast system was 3.5 instead of just part of the downpipe?

Eitherway 3inch should be enough no matter what turbo your running(within reason)

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