A BDS Exhaust Extension Kit is required for proper driveshaft clearance after installing a lift kit on your 2012-2018 Jeep Wrangler JK. When installed this kit adds clearance between the front driveshaft and the passenger's side exhaust crossover tube. Precision CNC-machined DOM steel tube spacers fit tightly to the factory exhaust flare joints which ensures no exhaust leaks while still maintaining adjustability. New hardware is included. The bolt-on design is completely reversible. This kit is a required accessory for BDS JK lift kits and is probably a critical add-on for other brands of suspension systems on the market where exhaust-to-driveshaft clearance is an issue.