This week Davin invites us into his classroom as he explains the stroker mod we are going to do to our 1993 Jeep XJ 4.0L. As Davin says, we weren't planning on doing any mods. We were just going for a stock build, but when we found out that all we needed was stock parts we couldn't pass up modifying this 4.0L. With a little mix and match from a 4.2L engine, we're turning our 4.0L into a 4.6L. Presented by RockAuto.com | Hagerty