Im am considering picking up one of these two options below, but before I do I'm wondering if anyone has has any experience with either or if you think it would even be worth it. It would be going into my 25ZX with a 502mpi that is basically stock.
http://www.cpperformance.com/p-13681...i-engines.aspx
or
http://www.cpperformance.com/p-13680...i-engines.aspx