What Is It?: Thanks to the highly evolved electronic engine management systems installed by the factory on modern musclecars, we've got showroom stockers with 13-second capability, clean tailpipe ...

I have a JET Performance Chip forsale. Sticket says it fits a '92 4.0L. I put it in my '94 XJ and it worked great. Selling it since I sold the XJ, asking $200 OBO. Email me with questions/offers.

While people may have biases over which method of administering fuel they think is best, engines don't give a rip. Feed them well, and they will treat you well. This is evidenced by the fact that ...