Prevent Driveline Damage. If you have lifted your 2012-2018 JK Wrangler 2.5 inches or more you are going to need a RedRock 4x4 Exhaust Spacer Kit. After lifting, the front driveshaft can easily make contact with the exhaust Y-pipe, resulting in a melted CV boot that exposes the driveshaft to the elements. This Spacer kit is designed to prevent this from happening and will help to extend the life of your Wrangler's driveline.Aluminized Steel Construction. RedRock 4x4 manufactures their Exhaust Spacer Kit utilizing aluminized steel tubing for strength and durability.Application. This RedRock 4x4 Exhaust Spacer Kit is designed for 2012-2018 Wrangler JK models equipped with 2.5 or more inches of suspension lift.