My V-spec was a lemon! Would not idle, OS refused to service it, and place I bought it from refused to take it back. I took it apart 3 times looking for cracks, leaks, etc. Sealed it tight for leaks, and still, NOTHING! I'll never buy an OS again. This is just my opinion, as I I know for a fact thousands of people are very happy with their OS. I got screwed, and wasted $300 on a paperweight. OS is off my list of Racing engines!