My TDI 130pd is going in for a remap in approx 3 weeks
Before it goes in, i was thinking of improving the air flow into the engine. Does anyone have any experience of this on a TDI?

I currently have two options:

1 - Replace standard air filter with aftermarket - e.g pipercross / K&N etc

or

2 - Keep standard filter and do a cold air feed into it? - not sure if anyones done this on a TDI yet - is it even possible or worth it?

If anyone has any experience of either of these or can suggest other ideas (apart from buying an S3 in the first place) it'd be appreciated

Mike