Product Description
DIAMOND EYE K4156S is a 4.0" 409 stainless, filter-back (DPF-back) single-side exhaust for 2011–2012 Chevy Silverado / GMC Sierra 2500/3500 HD 6.6L Duramax. It’s CNC mandrel-bent for smooth flow, corrosion-resistant, and installs bolt-on using OEM-style hangers. A vented stainless tip is typically included by Diamond Eye on this series.
FAQ: WILL THIS FIT MY TRUCK?
Yes, if you have a 2011–2012 GM 2500/3500 HD with the 6.6L Duramax (LML) and your emissions equipment (DPF) is intact. Designed for all cab and bed lengths. Always verify year/engine before ordering.
FAQ: IS IT EMISSIONS COMPLIANT?
This is a filter-back system that retains factory emissions hardware. It is generally considered emissions-friendly since it does not remove or defeat the DPF or catalysts. Check local regulations.
FAQ: WHAT MATERIAL IS IT?
409 stainless steel tubing and components for durability and corrosion resistance under daily use.
Fitment Details
- Vehicle: 2011–2012 Chevrolet Silverado 2500/3500 HD, 2011–2012 GMC Sierra 2500/3500 HD
- Engine: 6.6L Duramax (LML)
- Configuration: 4" filter-back, single side exit; all cabs/beds
Cross-Reference / Alternatives (MBRP-only)
- MBRP S6032304 — 4" Filter-Back, T304 Stainless, Single Side (2011–2019 GM 2500/3500 6.6L) — View at CPP Diesel
- MBRP S6032AL — 4" Filter-Back, Aluminized Steel, Single Side (2011–2019 GM 2500/3500 6.6L) — View at CPP Diesel
- MBRP S6033AL — 4" Filter-Back, Dual Outlet, Aluminized (2011–2015 GM 2500/3500 6.6L) — View at CPP Diesel
Specifications
| Brand | Diamond Eye Performance |
|---|---|
| MPN | K4156S |
| UPC | 841963102826 |
| GTIN | 0841963102826 (UPC-A) |
| System Style | DPF/Filter-Back, Single Side Exit |
| Tubing Diameter | 4.0" |
| Material | 409 Stainless Steel |
| Included Tip | Vented stainless tip (varies by kit revision) |
| Emissions Note | Retains factory emissions hardware |
| Shipping Weight | ~10–14 lb (boxed) |
| Package Dimensions | Approx. 46" L × 14" W × 14" H |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
