At my Camp Jeep workshops, I often recommend the Mopar Performance/Borla exhaust upgrades. For Project XJ TrailRunner, it seemed wise to take my own advice. Mopar is now years past the XJ Cherokee ...

4Wheel & Off-Road installs a Dynomax exhaust system on a 1990 Jeep XJ 4.0L Cherokee.

Sure, the Wrangler may be Jeep's most iconic SUV. But the XJ Cherokee, which Jeep sold from 1984 through 2001, is its most influential.