So I just leased a brand new 2014 A4 (Premium Plus, 2.0T, Quattro, 6MT, Black Optic) and I was looking into the possibility of doing the APR Stage I ECU upgrade. I've already looked into the issues regarding modifying a leased vehicle (Magnuson-Moss Warranty Act) and heard some other peoples' experiences with the Audi dealers.

My main question is if there are any other modifications required when performing this upgrade on this vehicle. When I did the APR Stage I ECU upgrade on my 2002 TT 225 I also had to upgrade the diverter valve, turbo inlet pipe, and switch to a cooler temperature range spark plug with a smaller gap. I emailed APR and they didn't think there were any additional modifications required on the A4, but I just wanted to get some input from people who may have already done this upgrade.

Thanks.