Been out tonight and given it a really good run. Disappointed that there arent many pops or bangs lol...but the noise really is brilliant. Couldnt tell much when sat inside the car, but one of my friends recorded me flying past a few times, and listening back, Im really impressed tbh. Ive instantly noticed a difference in power, it seems to have a bit more of a kick to it, and the power does seem to have increased a bit. Also...interestingly, I put 15 quid of fuel in before I went out, and with the run Ive done tonight, I would normally have used at least a quarter of a tank, but despite being very heavy on the right foot lol, and averaging 27 mpg, its barely moved. Dont know if Im being overly optimistic, but Im growing more happy with it already!!