I have just had the Collins CP2-E upgrade (including ITG intake, intercooler, boost hoses and turbo actuator) on my ST and I'm very pleased with it so far. It should be delivering around 240-245bhp. I had a look at most of the competition and thought this offered best value for money for me. (I was upgrading from MP215 with Mountune cat back and induction hose). The Mountune upgrade is very expensive for what you get. I don't doubt that it's good but it was too pricey for me. A lot of the stage 2 upgrades insist on having a sports cat or de-cat which pushes the price up. I don't think it's a necessary upgrade as, based on the stats I've seen, it only makes a negligible difference to the air flow. Sent from my G8441 using Tapatalk