Guys, Finaly got the K04-15 fitted on the weekend. And to be honest I am feeling both very happy and a little concerned at the same time. From the happy side first then I have noticed the follwoing differences:- a) The car go's like F**K and feels so much quicker (felt MUCH bigger gain than chip) b) Much smoother through low - mid rev range (prob due to increase in torque) c) Much more power and torgue in mid - high rev range (old K03 just seemed to struggle at this) d) Gives the 3rd gear a fantastic wallop for overtaking on duel carridge ways (used to feel a bit limp before) e) Great sound of the turbo spinning up (sounds like it means business) f) Maybe its just me but the extra power feels a little weird in one sence. By this I mean sometimes it doesnt particularily feel that the engine itself has that much more power just that the car feels so much lighter when accelerating. Then onto the concerning side. I say this because I am a little worried about the readings on my boost gauge when in the turbo band. Even though the car is perfectly smoooth to drive the readings seem a little high from what I have read on other posts in the forum on the K04 series in general. Here are the reading that I have found with my set up:- a) When accelerating hard in 1st, 2nd and 3rd the boost gives a max sustained pressure of 1.56 bar (23 psi). Sources suggest that a max sustained pressure should be no more than 1.3 - 1.4 bar b) When in low revs (2500 - 3200) and in 3rd/4th and I put my foot right down the boost readings went to 1.7 bar + (n.b. gauge only goes to 1.7 bar/25 psi) Bearing in mind that I am not sure of the accuracey of my boost gauge the readings however do seem at little high. I am a little worried about blowing the engine/turbo at this boost presasure so any advice would be appreciated. My initial thoughts are to change my N75J back to the stock valve to help reduce the overboost. One thing that I do actually find strange is that fitting the K04-15 without changing the software increases the boost pressure by so much, although I did expected a little increase. I would have thought changing the turbo without the software would have just increased air flow and not boost pressure as the boost should be controlled via the ECU & N75 valve. I want to ensure that I am not in danger of blowing my engine/turbo by running at too high a boost but to be honest would be a little gutted if this ment loosing any of that extra power that I have as the car feels F***ING fast. So guys your thoughts on this boost pressure would be appreciated.