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The Diamond Eye 4-inch cat-back exhaust kit for 2001–2005 Chevy/GMC 6.6L Duramax 2500/3500 trucks is a mandrel-bent, 4" system built from 409 stainless. It replaces the factory back section with robust tubing and fabricated components produced using CNC mandrel bending and modern fabrication equipment. This complete kit supports direct-fit installation across all cab and bed lengths.
Diamond Eye KIT 4in Catback Single MFLR RPLCMENT PIPE SS 01-05 CHEVY/GMC 6.6L 2500/3500
