Diamond Eye Performance Diamond Eye K5123A 5 inch Aluminized Cat-Back No Tip Exhaust with Turbo Direct Pipe | 2006-2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LBZ
Fits 2006-2007 6.6L Duramax V8 (LBZ) · 6.6L Duramax V8 (LMM)
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Price tracked 5 times since Sep 4, 2026 across the stores we check daily: low $585.95, high $833.26, currently $585.95.
where to buy · 2 retailers tracked
A cat-back exhaust replaces the pipes and muffler from the catalytic converter to the tip. It changes how the truck sounds and drops a little weight. This one is the Diamond Eye Performance Diamond Eye K5123A 5 inch Aluminized Cat-Back No Tip Exhaust with Turbo Direct Pipe | 2006-2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LBZ, listed to fit the 2006-2007 GMC Sierra 2500HD/3500HD with the 6.6L Duramax V8 (LBZ) or 6.6L Duramax V8 (LMM).
why this one — Cat-backs are a sound and looks upgrade first. Treat any power claim as unproven unless the maker publishes a dyno sheet. Alligator Performance lists it at $585.95, and the fitment above is what the listing itself states, not a guess.
No horsepower or torque figure published by Diamond Eye Performance for this part on the Alligator Performance listing, read 2026-09-04. Not estimated.
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No published gain figure for this part, and nothing here is a guarantee. Price is a list price and can lag the retailer; confirm at checkout. See how we check a price and our affiliate disclosure.