I ran Zex on a stock y7 block (Civic DX) and it ran good for a while..and then it went boom. If you're gonna do nitrous make sure you do it right. Learn from my mistakes. Get your compression checked and get leak tested also. Make sure you run Premium gas and although the Zex manual says that you don't need to retard your timing any but you do by -2 degrees I think. I don't know about that 131k though...you might think it runs strong but forcing 55 extra ponies into it might not be so good. But like FATHONDA said, if you've got 2 cars then why not...