Product Description
DIAMOND EYE K4124A-RP is a 4" aluminized, cat-back dual system for 2006–2007.5 Chevy/GMC 2500/3500 6.6L Duramax (classic body). This kit uses a split rear/split side exit and ships without a muffler for maximum flow and an aggressive tone. Mandrel-bent tubing, OE-style hangers, and a bolt-on design make installation straightforward while improving exhaust flow and EGTs.
FAQ: WILL THIS FIT MY LBZ?
Yes—fits 2006–2007.5 Silverado/Sierra 2500/3500 with 6.6L Duramax (LBZ, classic body), all cab/bed lengths. Always verify your emissions equipment and local regulations before purchase.
FAQ: DOES THIS INCLUDE A MUFFLER?
No. This is the no-muffler (replacement pipe) variant for a straight-through sound and lower backpressure.
FAQ: ANY CUTTING OR WELDING?
System is designed as a bolt-on using factory hangers. Minor adjustments may be required depending on vehicle condition and accessories.
Fitment Details
- Vehicle: 2006–2007.5 Chevy Silverado / GMC Sierra 2500/3500 HD, 6.6L Duramax (LBZ; classic body)
- Configuration: 4" cat-back, dual outlet, split rear/split side, no muffler
- Emissions Note: Retains factory catalytic converter (cat-back). Verify state/local laws.
Cross-Reference / Alternatives (MBRP-only, on cppdiesel.com)
- MBRP S6012409 — 4" T409 stainless cat-back, single side exit (06–07 LBZ)
- MBRP GMCA424 — 3" turbo downpipe upgrade (2004.5–2010 LLY/LBZ/LMM)
- MBRP T5050 — 4"→5" T304 tip, 12" length, clamp-on
- MBRP GP010 — 4" aluminized tailpipe (01–07 classic body)
Specifications
| Brand | Diamond Eye Performance |
|---|---|
| MPN | K4124A-RP |
| UPC | 841963101638 |
| GTIN | 0841963101638 (UPC-A) |
| Material | Aluminized steel, 4" mandrel-bent tubing |
| System Style | Cat-back, dual outlet — split rear/split side, no muffler |
| Vehicle Fit | 2006–2007.5 Silverado/Sierra 2500/3500 6.6L Duramax (LBZ; classic body) |
| Shipping Weight | ~55–83 lb (varies by packaging) |
| Carton Size | Approx. 52" x 21" x 13" |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
