Real gains from aftermarket air intake system can be achieved only on dyno bench and hood open or outside of town. In real life (esp. during city driving) aftermarket open cone system will give you nothing than just tons of heat soak. Ecu will see high IAT-s and it will make adjustments on ignition timing. Even if you will be able to hold up boost littlebit longer, car will be slower than with Oem air box + Velossa Tech snorkel. As I mention 100-times before - the biggest restriction of Oem air intake system is a fresh air supply.