DIAMOND EYE K4163S DPF BACK EXHAUST FOR 11–15 SILVERADO/SIERRA 2500/3500 4 INCH SINGLE IN DUAL OUT SPLIT SIDE STAINLESS

DIAMOND EYE K4163S is a 4.0" 409 stainless DPF-back exhaust for the 2011–2015 Chevy/GMC 2500/3500 6.6L Duramax. This single-in, dual-out split-side system reduces post-DPF backpressure and adds a clean, muscular look—while retaining emissions equipment. Built from mandrel-bent 409 stainless for daily-driver durability in tough climates. (Fits all cab/bed lengths for 2011–2015 LML).

Fitment

• Vehicles: 2011, 2012, 2013, 2014, 2015 Chevrolet Silverado 2500HD/3500HD & GMC Sierra 2500HD/3500HD, 6.6L Duramax LML (all cabs/beds).
• System type: DPF-back (filter-back); emissions equipment remains in place.
• Material / diameter: 409 stainless steel, 4.0" tubing; dual split-side exit.

FAQ: WILL THIS BOLT ON TO MY 2011–2015 LML?

Yes—this kit is designed specifically for 2011–2015 LML Duramax HD trucks and covers all cab and bed configurations. Uses factory-style hangers for an easy install.

FAQ: DOES IT DELETE ANY EMISSIONS EQUIPMENT?

No. This is a DPF-back system. Your DPF and emissions equipment remain installed.

FAQ: IS IT STAINLESS?

Yes—409 stainless steel for strong corrosion resistance and long service life.

Cross-Reference / Alternatives (MBRP-Only)

• MBRP S6033AL — 4" DPF-back, dual-outlet single-side, aluminized steel (2011–2015 LML).
• MBRP S6032304 — 4" DPF-back, single-side, T304 stainless (2011–2019).
• MBRP S6032AL — 4" DPF-back, single-side, aluminized steel (2011–2019).

Specifications

Sources: Diamond Eye K4163S fitment/details; CPP Diesel product listing; and retailer listings for UPC plus typical ship info/dimensions.