on the m40, i did the chip first and very shortly afterwards the TB. I felt like chip really didn't enhance performance in a speed sense but certainly made everything smoother, its difficult to describe but the drive seemed somehow easier.
Then I installed the new TB. It felt pretty much how you'd expect something to feel with a greater air flow, the difference wasn't huge but I was fairly sure it climbed to 4/5/6k a bit quicker and felt as though it was breathing a bit easier. Whilst I wouldn't say it was necessarily the best Ԛ£120 I've ever spent, it wasn't a waste and my m40 might not have been tip top to start with so others may see better gains. Perhaps even mating the 'wild' chip to the TB would be a better mix than the 'mild' which is what I had. In short I did notice a difference but I think I might invest in ITG induction first, not sure.
