This affordable exhaust upgrade kit boosts the performance and appearance of your 6.6L Duramax. It features a 4 inch elbow and a 5 inch polished or black exhaust tip that relocates the exhaust exit to the side of your truck. The premium 304 stainless steel material will never rust or fade. The no-weld, clamp-on installation can be done in minutes. All installation hardware is included.