I am putting a catted downpipe and probably the first cat in to get it through the French MOT.
The car has been mapped for a 3" total decat system.
Other than restricting the gas flow/power what else will it do?
If it safe to run it like this?
I don’t plan on running it on boost but if I have to warm the cats up a bit I may need to.
Appreciate some answers from people that know and not just guessing

 

Will just be running with the std downpipe so may need to warm it up to get it through

 

salut mec
bon normalement si c'est juste la downpipe avec cat ca n'influencera pas par contre si tu mets quand meme le premier cata la oui le map est different donc tout ce qui est mélange air/essence et lambda risque de ne plus etre dans la bonne echelle
voila j'espere que ca t'aidera
sorry for our english fellow mates, but it's easier to explain in french for 2 french speaking peoples
cheers all

 

I am English not French I just live here I speak some French but it’s not brilliant
I need somebody that has knowledge of mapping/tuning if possible or has been advised on this by an expert for their own car.

 

i think it shud be fine mate all it is doing is restricting the flow of gases. once passed just decat it again

 

Would like to know this also as I am exporting my car to Oz and need to fit the full oem system to pass the Oz road safety test thingy!

 

I did this exact thing recently to get my car sharked! The only worrying side effect was a smoking cat pipe!!! but then i fadn't driven the car for 8 months to i couldn't resist. Just don't hoon it or you'll kill the cat quick...

Should be ok for normal driving though. They don't tend to like rich mixtures and excessive heat so keep it to a minimum.