Purchased and installed myself, Forge cold air induction kit & forge blow off adapter for my TTs 8j. Cold air induction kit - at first I was looking at the notes like there is no way I'm going to be able to do this, after taking out the stock airbox the notes all came to part. The installation was so much easier than I thought and runs well and sounds amazing. You can hear it taking the air as it needs it and for a closed filter it really did surprise me with how loud it is. I would recommend buying the Forge cold air induction kit and I know nothing about installing stuff to cars and managed to do it, don't waste your money paying a mechanic! Blow off adapter - after fitting the induction kit, I basically felt like a mechanic so got straight in, however I did have to do some research on the location of the valve, which was at the front of the engine bay on my TTs. You can certainly hear it at pretty much any rev range, but obviously its louder the higher the revs. I purchased this to ease the turbo a but as I have blocked of the noise generator, sometimes I am cringing a little bit with how loud it is, but it only takes a couple minutes to install/uninstall so I'm not too worried My items where delivered on time and really haplynwith the products, will certainly use them again