Ever since i had a baileys blow off valve fitted to my Cupra R 225, i have noticed the car is alot slower to drive, esp higher up the gear range. I had a rolling road done recently and the figures i got were well down on the factory figures. Maxium output at the flywheel was 190 brake, when really the car should be pushing around the 225 mark. I have noticed once i change from 5th to 6th gear the car takes ahell of a long time to build up speed, this was never a problem when i had the stardard valve fitted. Does anyone know which is the best dumpvalve for this car?, as alot of people seen to be using the Forge 007 one in their car.