Flowmaster FlowFX Dual Mode Muffler W/ Active Valve For 2019-2021 GM 1500 5.3L 2011-2015-6.6l-lml-duramax 75" x 90° Boot Size:28X14 Keep engine temperatures under 67BHP KG1 Forged Splice (KC)
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Ships within 48 hours · Estimated delivery Sep 29 - Oct 4