430HP Ford Focus RS Wolf Racing - Acceleration with Backfiring Sound!

This time I have filmed a Wolf Racing Ford Focus RS 400 Stage 2 equipped with Milltek Non resonated cat back exhaust racing on a closed airfield against other cars. Wolf Racing upgrades the 2.5 five-cylinder turbocharged engine up to 430HP and 580Nm! Although the fact is that the RS is for a while on the market, it sounds pretty good! Especially with an aftermarket exhaust system like Milltek, Mongoose, Mountune or Wolf Racing! Modifications on this Ford Focus RS: -WOLF Stainless steel exhaust system with