Diesel performance parts for the 2011, 2012, 2013, 2014 & 2015 Chevy / GMC Duramax Diesel 6.6L LML. We provide the parts to completely eliminate all emissions related components. Exhaust systems that can delete your Diesel Particulate Filter (DPF), Catalytic Converter (CAT), Diesel Oxidation Catalyst (DOC) and/or Selective Catalytic Reduction (SCR). Remove your Exhaust Gas Recirculation (EGR) valve and cooler. Eliminate the need forDiesel Exhaust Fluid (DEF). These parts together with a DPF Delete capable tuner can all be done without any diagnostic trouble codes or check engine light.