Everyone likes to dog the hpp lol, but i remember the day after I got my 373's in my old 97 A4....I put there programming on hit the gas and my friend(had a full bolt on 93) an I looked at each other w/ our mouths wide open. It was a huge sotp gain. Torque or whatever the car felt faster for sure, seems like I used a little more gas though after install. I never had a problem w/ mine either