I have mk7.5 golf tsi 1.8T auto Im thinking to do stage 3 IS20 IE. Can I run this tune with IS20 and catless downpipe only?. I cantacted the IE they told me you need to run intercooler inlet pipe and intake. But I find that ridiculous bc a have seen GTI stage 2 runing only catless db and besides we have same intercooler evrething exept turbo and exhaust 
samething my bro have A3 and they told me his tune is not compatible. We plug it bro it worked 
I spend another 1000 bucks for nothing