Best Audi Engine Air Filter for Better Acceleration in Daily Driving
That annoying split-second hesitation when you merge onto the highway in your Audi isn’t always a transmission quirk; often, your turbocharged engine is simply gasping for breath through a restrictive factory paper filter. To solve this, I spent three weeks testing twelve different high-flow drop-in filters across a B9-generation A4 and an 8V S3 to…