Product Description
DIAMOND EYE K4122S is a 4" T409 stainless steel cat-back exhaust for 2006 and early 2007 (Classic) Chevy/GMC 2500/3500 6.6L Duramax. This single side-exit system retains the factory catalytic converter and includes a performance muffler for a clean tone, lower EGTs, and freer flow.
FAQ: WILL THIS FIT MY LBZ?
Yes. It is engineered for 2006 & early 2007 Classic-body Silverado/Sierra 2500/3500 6.6L Duramax (LBZ), all cab and bed lengths. It is not intended for 2007.5+ LMM trucks.
FAQ: DOES IT INCLUDE A MUFFLER?
Yes, K4122S includes a stainless performance muffler. If you prefer no muffler, see the straight-pipe variant (K4122S-RP).
FAQ: WHAT MATERIAL IS IT?
T409 stainless steel tubing and stainless muffler for excellent corrosion resistance and long service life.
Fitment Details
- Vehicle: 2006–Early 2007 (Classic) Chevrolet Silverado / GMC Sierra 2500HD & 3500HD, 6.6L Duramax (LBZ)
- Configuration: 4" cat-back, single side exit, includes muffler, uses stock catalytic converter
- Cabs/Beds: All cab and bed lengths (factory-style hangers/brackets)
Cross-Reference / Alternatives (MBRP-only, CPP links)
- MBRP GP010 4" Tail Pipe, 2001–2007 GM Classic — rear section for 4" systems.
- MBRP S6012409 4" XP Series Cat-Back (category listing) — T409 stainless cat-back for 2006–2007 LBZ.
Specifications
| Brand | Diamond Eye Performance |
|---|---|
| MPN | K4122S |
| UPC | 841963101522 |
| GTIN | 0841963101522 (GTIN-12/UPC-A) |
| Material | T409 Stainless Steel |
| Diameter | 4.0" |
| Layout | Cat-Back, Single Side Exit |
| Muffler | Included (stainless) |
| Emissions Note | Retains OEM catalytic converter (Classic body) |
| Shipping Weight | ~66 lb |
| Package Dimensions | 53" x 22" x 14" |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
