Product Description
DIAMOND EYE K5126S is a 5.0" single-exit 409 stainless cat-back exhaust engineered for 2006–2007.5 Chevy/GMC 2500/3500 6.6L Duramax (LBZ). Mandrel-bent tubing and a straight-through muffler improve flow, lower EGTs, and deliver a deep, controlled tone while reusing factory hanger locations for an easy bolt-on install.
FAQ: WILL THIS FIT MY TRUCK?
Yes—if you have a 2006–early 2007/2007.5 Silverado or Sierra 2500/3500 with 6.6L Duramax (LBZ), any cab and bed length. This is a cat-back system that retains the factory catalytic converter and exits passenger side.
FAQ: WHAT’S INCLUDED?
5" 409SS mandrel tubes, straight-through muffler, tail section, clamps, and hardware. Reuses OEM hangers. See instruction sheet for trimming notes based on wheelbase.
FAQ: STAINLESS OR ALUMINIZED?
This part number is 409 stainless steel. For a budget aluminized version or a no-muffler stainless option, see Cross-References below.
Fitment Details
- Make/Model: Chevrolet Silverado 2500/3500 HD; GMC Sierra 2500/3500 HD
- Engine: 6.6L Duramax LBZ
- Years: 2006–2007.5
- Configuration: Cat-back, single passenger-side exit, with muffler
- Cab/Bed: All cab and bed lengths (trim-to-fit per instructions)
Cross Reference Items
- K5126S-RP — 5" 409SS cat-back without muffler (stainless)
- K5126A-RP — 5" aluminized cat-back, louvered, no muffler
- Install Instructions (PDF)
Specifications
| Brand | Diamond Eye Performance |
|---|---|
| MPN | K5126S |
| UPC | 841963109245 |
| GTIN | 0841963109245 (UPC-A) |
| Material | 409 Stainless Steel |
| Main Tube Size | 5.0" (cat-back) |
| Exit | Single, passenger side |
| Includes Muffler | Yes (straight-through) |
| Shipping Weight | ~66 lb |
| Package Dimensions | ~53" x 22" x 14" |
| Emissions Note | Cat-back system; retains factory catalytic converter |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
| Country of Origin | USA |
FAQ: DO I NEED TUNING?
No tuning is required for a cat-back. Expect improved throttle response and a deeper exhaust note.
