2011, 2012, 2013, 2014 & 2015 Chevy / GMC Duramax Diesel 6.6L LML. DPF delete parts to completely remove all emissions related components. Exhaust systems that remove 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 for diesel exhaust fluid (DEF). With a DPF Delete-enabled tuner, this can all be done without diagnostic trouble codes or check engine light.