ok I went to vist my mate who has a sick cally and we wanted to check to wasnt the air flow meter or the throttle position sensor so we stuck his throttle body Powercap and airflow meter on my car.
I was not convinced by Mantzels claims but it was the best test for the sensors and indeed the cap.
First trun of the key and the car seemed smoother at idle, In my head its all in the mind I thought.
But off we treked and well the induction noise was up and crisper, raspier, nicer oooohhh yeah!
Troque seemed to be up all over (slightly) as at 4000 the change in pull wasnt as noticable but the car was definently not down on torque or power, more driveable I would say.
So would I buy one............No but only cos I plan to go for throttle bodies soon as I can afford to, If I was tuning the stanard set up then I would get one.