DIAMOND EYE K5126S-RP CAT BACK EXHAUST SYSTEM FOR 06-07.5 SILVERADO/SIERRA 2500/3500 5 INCH SINGLE PASS NO MUFFLER STAINLESS

DIAMOND EYE K5126S-RP is a 5.0" 409 stainless cat-back exhaust system engineered for the 2006–2007.5 Chevy Silverado / GMC Sierra 2500/3500 6.6L Duramax (LBZ). It delivers maximum flow, lower EGTs, and an aggressive tone by replacing the muffler with a straight-through race pipe. Mandrel-bent tubing and OE-style hangers ensure a precise, bolt-on fit across all cab and bed lengths.

• Application: 2006–2007.5 Silverado/Sierra 2500/3500 6.6L Duramax (LBZ), all cab & bed lengths
• Configuration: 5" single, passenger-side exit, no muffler (muffler delete)
• Material: 409 stainless steel for heat-cycle durability and corrosion resistance
• Direct-fit: Utilizes OEM-style hangers and includes necessary clamps/hardware

FAQ: WILL THIS FIT MY TRUCK?

Yes—if you have a 2006, 2007 Classic, or early 2007.5 6.6L Duramax (LBZ) 2500/3500, this cat-back fits all cab and bed combinations. Always confirm engine code and emissions equipment before ordering.

FAQ: DOES THIS KIT INCLUDE A MUFFLER?

No. The -RP suffix indicates a muffler replacement pipe (muffler delete) for a more aggressive sound and less backpressure.

FAQ: WHAT STAINLESS GRADE IS USED?

Diamond Eye specifies 409 stainless steel on this application for strength and longevity under high heat.

Fitment Details

• Years: 2006–2007.5 (Classic & early-new-body)
• Make/Model: Chevrolet Silverado 2500/3500 HD; GMC Sierra 2500/3500 HD
• Engine: 6.6L Duramax LBZ
• Exit: Single passenger-side

Cross-Reference / Related Diamond Eye Kits

• K5126S — Same platform with muffler (409 stainless)
• K5126A-RP — Aluminized, muffler-delete version
• K5126A — Aluminized with muffler

Specifications