Removal of Stock System 1. Apply some penetrating lubricant to all exhaust fasteners, hangers, and rubber insulators. 2. Loosen the three (3) nuts securing the extension pipe flange to the overaxle pipe. Refer to Figure 1. 3. Remove the factory over-axle/tail pipe. Figure 1 4. Loosen the three (3) nuts securing the extension pipe to the flange directly behind the exhaust filter and remove the extension pipe. Refer to Figure 2. Installation of MBRP Inc. Performance Exhaust 1.