Adding 2.5" or more lift to your 2012-2018 Wrangler JK V6-3.6L will change your vehicles driveline and can create clearance problems between your driveshaft and factory exhaust. aFe's 304SS exhaust spacers are a great problem-solver which moves the factory y-pipe rearward to prevent contact between the driveshaft and exhaust during extended suspension travel. This spacer kit is NOT required if using aFe Twisted Steel Y-pipe. JK models with Long-Arm lift kits will require increased clearance. aFe's 2" Loop Relocation Pipe (PN 48-48021) will accommodate this clearance issue without compromising sound or performance.