The TeraFlex TJ BellyUp increases your ground clearance by up to 2-3/8? by replacing the factory skid plate with a lower-profile 1/4? plate steel heavy duty skid plate. A 1? body lift is recommended with Rubicon applications for proper transfer case clearance. Some exhaust adjustment may be necessary. Fits all TJ Wrangler models including the Rubicon and Unlimited. Note: This kit requires some fine tuning and adjustment to eliminate driveshaft vibration. Short shaft kit: This kit will require the use of a short shaft kit (Part # 4444400, or # 4444401). Lowering kit: Because the BellyUp can make driveshaft angles severe, a lowering kit (Part # 1900100 for a 1? drop or Part #1900000 for 1/2? drop) will decrease the severity of that angle. This issue is common when the BellyUp is combined with a 4? suspension system.