2012 18 Jeep Wrangler JK Exhaust Extension Kit 1986 buick century custom esi9415862 All QA1 springs are lifetime BDVK_752954 All QA1 springs are lifetime guaranteed to remain within 2% of the original free height and rate under normal operating conditions This easy to install kit features front and rear spacers to lift and level your vehicle for an improved look and enough ride height to run up to 31in tires A BDS Exhaust Extension Kit is required for proper driveshaft clearance after installing a lift kit on your 2012 2018 Jeep Wrangler JK Precision CNC machined DOM steel tube spacers fit tightly to the factory exhaust flare joints which ensures no exhaust leaks while still maintaining adjustability