I think nazzuro's pretty much covered it what you need to do, however I left it to idle for 35 mins without touching the throttle then went for a 30-40 minute gentle drive and turned the car off after letting it cool down. Took it for a drive again the next day, gentle until it was fully warmed up and then gradually feeding the boost in. NOTE: DO NOT run 1Bar with your mods, you're engine will probably poop itself Currently you have: -Decat -Exhaust I would give the engine a fresh service, then buy: -Boost gauge to monitor boost levels and setup HKS actuator -HKS Actuator (as the stock actuators are very weak and don't hold boost well) -FMIC (after fitting my Mine's ECU it was very apparent that I needed a FMIC, fitted one the next day and felt a massive improvement and a lot more grunt) -NGK Iridium heat range 7 spark plugs With that lot you should be okay to run 0.8bar. Before running 1Bar you should get an uprated exhaust manifold (stock manifold is very restrictive), and perhaps some uprated HT leads. Amjad