When you take your Jeep Wrangler to get inspected, arguably the most important assessment is the emissions test. This test measures your vehicle's pollution output under simulated driving conditions. If your Jeep Wrangler fails, it probably means there is a problem in the exhaust system, which means expended gases are not being removed from your motor and forced out through the tailpipe as quickly and consistently as they should be. The good news is that Jeep Wrangler stock replacement exhaust parts are relatively inexpensive and easy to install. As soon as they are snapped or bolted into place, you should pass your inspection with flying colors.