DIAMOND EYE K5126A CAT BACK EXHAUST SYSTEM 06-07.5 SILVERADO/SIERRA 2500/3500 5 IN. SINGLE PASS LOUVERED W/ MUFFLER ALUMINIZED

DIAMOND EYE K5126A is a 5" aluminized steel cat-back exhaust system engineered for the 2006–2007.5 Chevy Silverado / GMC Sierra 2500 & 3500 with the 6.6L LBZ Duramax. It’s a single passenger-side, louvered with muffler configuration designed to improve flow, reduce backpressure, and deliver a deeper tone while maintaining drivability and towing manners. (All cab & bed lengths.)

Application scope verified for 2006 & early-2007 LBZ Duramax; see maker’s listing and instruction sheet.

FAQ: WILL THIS FIT MY TRUCK?

Yes, if you have a 2006 or early-2007 (2007.5 “new body” included in coverage per instructions) Silverado/Sierra 2500/3500 with the 6.6L LBZ Duramax. This system is designed as a direct cat-back for all cab and bed lengths. Always confirm model year and engine (LBZ) before ordering.

FAQ: WHAT’S INCLUDED?

Mandrel-bent 5" tubing, louvered performance muffler, tailpipe, hangers, and clamps. Hardware varies by kit revision; follow the included instruction sheet for layout.

FAQ: MUFFLER DETAILS?

The aluminized-series system pairs with Diamond Eye’s aluminized performance muffler (field-referenced as A445084). Stainless muffler option is S455084 on stainless systems.

Fitment Details

• Years/Engines: 2006–2007.5 GM 2500/3500, 6.6L LBZ Duramax
• Configuration: Cat-back, single side exit (passenger side), louvered with muffler
• Vehicle coverage: All cab & bed lengths
• Emissions note: Retains the factory catalytic converter; follow local laws.

Cross-Reference & Related Items

• K5126A-RP — muffler replacement pipe (muffler-delete companion for the same platform)
• K4122A — 4" aluminized cat-back (alternative size for 06–07.5 LBZ)
• Diamond Eye Muffler — A445084 (aluminized), S455084 (stainless) for service or sound changes

Specifications