I had a Mk1 version fitted, which i had to take off & send back due to faulty core. Bought a Pro alloy instead.
I hear a lot of 'not-so-positive' feedback about the Airtec units, better focus on a Pro Alloy instead. Having one fitted as we speak ))
My Airtec one is fine. 365bhp and 385ftlbs with no issues. May update to a Pro Alloy eventually but this is more than up to the job. I wouldn't bother with the Stage 2 one personally though, All its gonna do is send your water and oil temps sky high if you use it hard.
@Jamie, you are running Stage2 I assume? In The Netherlands your average Stage2 Meg3 would get you to 260-270hp and 420Nm..