:(Is there any way of telling whether you have the 10:1 compression or the 9:5:1 on your engine. I have a turbo but I want to make sure I have the 9... because I don't like to hear any kaboom noises. What do you guys think??:(

Well, if you have the us sr20de then it is a 9:5:1 compression....if you did a swap with a jdm motor then its possible you have the 10:1, but its also possible you have the 9:5:1 as well with that. If you have an sr20det.....then it was made for the turbo, so it will be the right compression already. Hope this helps..