Hi all. I'm in South Africa and recently bought an early 2008 S3. The car has a 76mm downpipe, the HPFP tensioner mod and Revo 2+ software. When I bought the car the sound was not present. After a few weeks it started. When I change at about 3000rpm it makes a sound like a slight dump, but more like a squirt. Is this an issue? I think it is because I think the car should be pulling a lot better on boost. In the hope of a quick fix I changed the DV to the piston-type upgrade. No change. Removed the engine cover and saw no obvious issues. Please share any similar experiences or tips. Cheers.