Hey guys,new member here! So this is my first Audi,I've had it for about 2 years now. Its the BWA spec(147KW) ,2.0Tfsi DSG. Car is completely stock,so I wanted a bit more power out of it.So tomorrow I am going to install a 76mm decat downpipe..My question is,have any of you installed similar decatted downpipe WITHOUT cat foolers? Reason I am asking is because the shop I'm getting it done at is going to install it without any Co2 sensor cat foolers.The owner reassured me that on this model of A3's that it is not likely to throw any codes or check engine light even without the cat fooler installed, just wanted some advice or clarity on whether this is true and if any of you have done it? P.s reason I'm not putting the foolers on is because I can't afford it right now Broke 21 y.o college student lol,but luckily the guy gave me a good deal on the price because I said he could keep my stock cats which I know is worth some money.Any advice would be appreciated, thanks in advance.