The TeraFlex exhaust spacer kit needed for all 2012+ model JK Wranglers using a lift kit with 2.5” or more lift. The spacers are installed between the driver and passenger head pipe flanges and the flanges of the cross pipe, which move the exhaust cross pipe rearward. This prevents contact between the front driveshaft and the exhaust cross pipe during suspension down travel. Bolt on installation. For 2012+ JK Wranglers.