Hi guys been for a good blast in the 5 today to blow the winter cobwebs out so I know everything was up to temp and when I finished poppped the bonnet to check if the flap in the intercooler was working on that thermo swtich affair same as in the airbox it was still closed so my question is will it make a noticable difference to my car being shut all the time and the air bypassing the cooler fins if there will be then I will follow the destructions on the search to de-flap it..My car is running 100% standard and to be honest feels pretty good as it is boosts nice and strong etc..I dont want to rip it all apart for feck all gain ..Do these thermo switches get duff over the years? Thanks for any info