Colin thanks for the pics. That looks quite interesting. I´m wondering if a paper made filter is also available in this shape. At least for my Honda S2000 13 Years ago Honda used such an air filter made of paper. Where do you have placed the MAF sensor, I cannot see it based on the pics.?
All sensors are where they are as OE. All the chap who did the work changed was to take the air inlet side from the airbox and filter(now removed of course) turn it through 180 degrees and out alongside the cooler side of the engine. the car draws cooler air (not cold air) from the inlet manifold side not the exhaust manifold side. When I bought the car I was advised that the car was used by Viezu a UK based tuning company to develop a fuel map for this model, they had it for a day and a claimed 10BHP was achieved, they said there was a lot more in there but it would require a different air intake system and exhaust manifold (but I think we all know that ;-)). Makes for a very tractable and useable car, pulls well from low down and gives upper 40's MPG when in touring mode. It wont keep up with the throttle body cars but when we get to the twisties it gets lively ;-).