Description

Upgrade your Duramax 6.6L (2004.5–2010 LLY, LBZ, LMM) with this Up-Pipe & 3″ Downpipe Kit with CCV Reroute , designed to enhance turbo efficiency, reduce restrictions, and extend engine life. Constructed from heavy-duty stainless steel and aluminum alloy , this kit delivers up to 50% more exhaust flow compared to stock , significantly lowering backpressure while improving turbo response. The 3″ mandrel-bent downpipe and 11-gauge, .120” wall up-pipes provide durability and long-lasting performance under high-heat diesel conditions. The integrated CCV Reroute System prevents crankcase blow-by from re-entering the intake, eliminating oil deposits, intake gumming, and puddling under your truck. A streamlined, venturi-style design improves pressure flow without restrictive baffles and ensures virtually no oil loss. With direct bolt-on fitment to factory manifolds, precision TIG-welded flanges, and firewall clearance on the passenger-side pipe, this kit offers superior strength and hassle-free installation. ✅ Features & Benefits Free-flowing 3″ downpipe for better exhaust flow Heavy-duty stainless steel 11-gauge up-pipes (2″ OD, .120 wall) Black anodized fittings for durability CCV reroute prevents oil buildup and intake gumming 50% more exhaust flow than stock Faster turbo response and cooler EGTs Passenger-side up-pipe indented for firewall clearance Direct bolt-on replacement – no modifications required ⚙️ Fitment 2004.5–2010 Chevrolet Silverado 2500/3500 HD 6.6L Diesel (LLY, LBZ, LMM) 2004.5–2010 GMC Sierra 2500/3500 HD 6.6L Diesel (LLY, LBZ, LMM) 📦 Package Includes 3x Pipes (Up-pipes & Downpipe) 1x CCV Reroute Fittings 2x Reroute Port Plugs 1x Resonator Plug 1x PVC Pipe 4x Flange Clamps 4x Gaskets 12x Bolts 12x Nuts This Duramax 6.6L Up-Pipe & 3″ Downpipe with CCV Reroute Kit is the ultimate upgrade for LLY, LBZ, and LMM engines, giving you more power, cleaner intake air, and improved reliability .