Alright! I finally received the ECU back from the UK, completed a few checks, and finally took her for a spin today. OMG.. felt strong, perhaps more torque than previously but probably the biggest difference is the sound! unreal.. roller barrels with cat bypass changed the RPM tune completely. Pretty decent and "civil" at 3000 RPM but past 5000 RPM, it is a screamer. Plus lots of backfire when I let go of the pedal rapidly. My only concern right now is if i'll be allowed at LimeRock ( able to meet the decibels rules?). I have the r500 carbon fiber airbox which helps... but i guess we will see.
Next will be to dyno the car to see what this upgrade really did. Will keep you posted.