Just a suspicion mate,
The exhaust can be ruled out I think as it is 3inch straight through with no cat and 1 muffler. Any other ideas would be great, the car is off the road at the moment and I have time to play around with it so any suggestions I will take on board and sus out.
Would be great to crack 260-270 before I venture down the e85 path
Cheers - Trent