Product Description
DIAMOND EYE K4124S is a 4.0" T409 stainless cat-back dual system for 2006–early 2007 (LBZ) Chevy/GMC 2500/3500 HD. It uses CNC mandrel bends and a straight-through muffler to reduce backpressure, drop EGTs, and deliver a deep, controlled tone. Split rear/side exits give a balanced, aggressive look while retaining OEM hanger locations.
FAQ: WILL THIS FIT MY TRUCK?
Yes—fits 2006–early 2007 (LBZ) Silverado/Sierra 2500/3500 HD (all cab/bed lengths), classic body style. Not for 2007.5+ LMM trucks. Always confirm engine (LBZ) and build date.
FAQ: IS IT STAINLESS?
Yes, this kit is built from T409 stainless steel tubing with a stainless muffler for durability through heat cycles and winter road salts.
FAQ: DOES IT INCLUDE TIPS?
No tips are included from the factory; choose your preferred tip style/finish separately.
Fitment Details
- Platform: 2006–early 2007 (LBZ) Chevy Silverado / GMC Sierra 2500/3500 HD, classic body
- Configuration: Cat-back, dual split rear/side exits, with muffler
- Diameter: 4.0" (101.6 mm)
- Emissions note: Off-road/competition use where applicable; observe your local laws.
Cross-Reference / Alternatives (MBRP-only)
- Alternative (single side): MBRP S6012409 4" Cat-Back, T409 Stainless, 2006–2007 LBZ
- Regular-cab adapter (if needed): MBRP GMS9423 4" T409 RC Adaptor
Specifications
| Brand | Diamond Eye Performance |
|---|---|
| MPN | K4124S |
| Material | T409 stainless steel |
| System Type | 4" cat-back dual, split rear/side, with muffler |
| Vehicle Fit | 2006–early 2007 (LBZ) Silverado/Sierra 2500/3500 HD, all cab/bed lengths |
| UPC | 841963101652 |
| GTIN | 0841963101652 |
| Ship Weight | ~84 lb |
| Package Size | ~52" x 21" x 13" |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
