I'll be watching this a little bit too, I've got the CAVE in a Golf running an APR stage 1 but keep wondering what's next but of course am mindful of that engine. It's never missed a beat and has been down the drag strip and around WSID and Wakefield Park a couple of times... oh and the Cooma 1000.

I've got a Forge CAI and keeping thinking about either the S3 intercooler upgrade or a front mount, but the real hurdle has been the exhaust (although I haven't looked into it in a long while). The issue was that no one made a downpipe with the required heat shields, everything else is easy enough. Is there the same issue for the Polo/A1?