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BOV leak? Induction sound help!! Hi skyline aficionados. I am fairly new in Aus and recently I bought a r33 s1 gtst rb25det. About a week ago I was cruising around and a cop pulled me over, the usual story, drivers license, open the bonnet etc (ok, I wasn't cruising) Everything was good until he gave me a yellow sticker, this was new to me, who would have thought that in Aus the cops are also mechanics.. Anyway, today I took the car to the pits and it failed because of missing mesh in IC, tyres with low tread a pod filter without permit and a blow off valve. All of the above can be fixed quite easily with the exception of the blow off valve.. The engine is practically stock, just have aftermarket IC, the pod and the boost valve is bypassed, the blow off valve is stock. The car does indeed have a massive induction noise, which is why the inspector complained.. I don't need to rev a lot to start hearing that induction sound and at some times (seems to be only in constant rpm) the sound seems to be slightly metallic, if I just push the throttle the sound keeps going up until I lift it and i ear normal turbo flutter, not the pigeon sound just the normal decompression. Could this be the stock BOV leaking? a boost leak? the pod filter?? The only odd thing that I see is the boost valve bypass, its not the usual grounding the black wire and leave the hoses. Instead I have the wastegate connected directly to the hose that comes from the turbo and goes to the IC, the top connector on the valve has nothing on it and the bottom one is connected to the intake (after the IC) will post some pics later. Long story short I just want the noise gone otherwise i might as well ask for a job at the pits since i'll be there all the time. Since this is my first post and I feel bad to ask without giving something I OCR'ed the entire R33 manual to make it search friendly (will make another post) https://drive.google.com/file/d/0B2fI6rThQ1T9YTZaT1JfN3IxekU/view?usp=sharing Thank you all