A new one to replace the standard s3 one Kev. The twintercooler isn't a real upgrade. We logged al's car and the 2nd core blocks the main core and creates lag.
I 'm going for the STASIS eurojet which gets really good reviews and shows very low charge temps in high temps . It gives me headroom to advance my timing as the car is not gonna be able to run the current timing without timing pull when the summer temps come in
I'm in the process of deciding which intercooler to go for. I'm enjoying the extra power with this cooler weather.
Also going stage 2+ once APR have the switching map available which should be a month or two.
The airtec twincooler is cheap but everyone's raving about the Wagner intercooler but no prices available yet.