FITMENT
- 2001-2004 6.6L Silverado & Sierra Duramax LB7 Diesel
- 2004.5-2005 6.6L Silverado & Sierra Duramax LLY Diesel
- 2006-2007 6.6LSilverado & Sierra LBZ 6.6L Diesel
- 2007.5-2010 6.6L Silverado & Sierra LMM Diesel
- 2011-2016 6.6L Silverado & Sierra LML Diesel
- Note: Specifically designed for the Passenger Side of the vehicle only.
- Will NOT fit 3500/4500/5500 Cab & Chassis commercial-style trucks.
DESCRIPTION
Product Overview
- The 2001–2016 6.6L Duramax engines (LB7, LLY, LBZ, LMM, and LML) are famous for heavy towing, but their factory exhaust up-pipes have a well-known vulnerability. The thin factory flex bellows repeatedly fail under thermal cycling, cracking open to cause severe boost leaks, lost horsepower, elevated EGTs, and loud screeching exhaust leaks under load.
- The High-Flow Exhaust Up-Pipes offer a permanent, heavy-duty upgrade. By eliminating restrictive factory crushes and sealing off exhaust leaks, they restore full drive pressure to your turbo, sharpens throttle response, and keeps EGTs under control.
Key Features
- Extreme Heat & Corrosion Resistance: Constructed from heavy-gauge stainless steel to withstand severe thermal expansion, towing stress, and road salt.
- Increased Exhaust Velocity: Smooth, thick-wall mandrel-bent tubing reduces exhaust backpressure, feeding exhaust energy directly to the turbine wheel for quicker boost response and lower EGTs.
- Fixes Factory Flex Bellow Cracks: Heavy-duty interlocking mesh stainless flex bellows permanently stop exhaust leaks, soot stains, and squeals caused by cracked stock flex sections.
- Direct Bolt-On OEM Replacement: Precision mounting geometry ensures a direct bolt-on installation with stock manifold flanges and factory or aftermarket turbo housings.
FAQ
Q: How do these generic high-flow up-pipes compare to expensive OEM Duramax replacement up-pipes?
A: Factory OEM up-pipes use thin-walled flex bellows that repeatedly crack under heat expansion. This kit utilizes thick-wall stainless steel tubing with reinforced interlocking inner mesh bellows, offering superior crack resistance at a fraction of the dealer cost.
Q: Is this product a complete driver and passenger side set, or just one side?
A: This includes one single Passenger Side (Right Side) Exhaust Up-Pipe, along with the necessary high-temperature multi-layer steel gaskets for installation.
Q: Why does the passenger-side Duramax up-pipe fail more often than the driver-side?
A: The passenger-side up-pipe experiences higher thermal stress and physical twisting force from engine movement under acceleration. Over time, the factory passenger flex bellow fatigues and cracks.
Q: Will replacing just the passenger-side up-pipe fix my engine bay screeching noise?
A: Yes, in most cases. Because the passenger side is the most common failure point for exhaust leaks on LLY/LBZ/LMM/LML engines, replacing this damaged pipe eliminates the loud whistling sound under boost.
