[Mustangman25]

There are some people, though they are rare, who would defend the SPI, but I really think that really modding out a SPI is pretty pointless...it's very hard to find good, quality parts for the SPI to begin with, and even then, you're starting with around 110hp, as opposed to 130 in the Zetec, plus the Zetec really makes a lot more torque. If you do plan to mod out the SPI, then be prepared to spend a good deal of time finding good, quality parts. If you're really serious about this, then there's always the Zetec swap route.