how easy is it to swap the up-pipe on a 01wrx with a decat one? just thinking about MOTS and swapping them back and forth!!
cheers

 

are you talking about the uppipe or the downpipe? they both have cats..

But to answer the question you asked, the uppipe is a pain, and you have to take the downpipe off to do it anyway.

 

yes i talkin about the up pipe! thanks for answer! would garages charge the earth for swopping my standard up pipe with a decat one?

 

erm, not the earth.... but prices vary a lot!

is the rest of you exhaust standard? or have you a decat downpipe and center too ? if so, get you uppipe changed, then when MOT time comes just swap your center section, or downpipe... both of them are 10times easier to swap that the uppipe.

 

Will a centre cat alone be enough to pass an MOT?

 

the rest of the zorst is standard!

 

ahh well if you change the uppipe you will be fine...... i cant see the point behind changing the uppipe on its own tho without changes to the rest of the zorst..

lol no i dont fink he would pass with just the center in... center and down should be alrite tho, classic's dont have a cat in the uppipe and they are fine with MOT's

 

so u dont think its worth changing the up pipe if the exhaust is standard? many people have done it on here!

 

The up-pipe on it's own i would say not worth it but you could change the downpipe as well and leave the centre cat in which is what i had done originally and i had it checked by a MOT station and it still passed (it was on the limit but would still pass )

 

Generally the up-pipe is the last one people do as it is the hardest to change and the gain really only allows the turbo to spool quicker rather than giving any absolute increase in horses..

I've had mine done but mainly because I'm running higher boost which means there is a (slim) chance of the up-pipe cat breaking up and killing the turbo due to the increased heat...

Bigger power gains from de-catting the downpipe like other posters have said, you can leave the centre cat in place, AFAIK it's not as restrictive as the D/P and you should still pass an MOT.