FITMENT
- 2004.5-2010 6.6L Chevrolet Silverado Duramax LLY LBZ LMM 2500HD / 3500HD.
- 2004.5-2010 6.6L GMC Sierra Duramax LLY LBZ LMM 2500HD / 3500HD.
- Note: Standard pickup models only. Does NOT fit Cab & Chassis commercial truck frames.
DESCRIPTION
Product Overview
- Restrictive exhaust geometry and dirty intake air throttle the power, spool response, and long-term durability of 6.6L LLY, LBZ, and LMM Duramax trucks. Up-pipe EGR risers restrict turbine drive pressure, the restrictive factory downpipe bottles up exhaust discharge, and oily crankcase blow-by continuously contaminates your intercooler and turbo compressor.
- Optimize your entire turbo breathing system with this 3-in-1 Performance Up-Pipe, Downpipe & CCV Reroute Package. Designed to bypass exhaust flow bottlenecks and route oily vapors away from your air charge, this kit accelerates boost response, drops working EGTs, prevents up-pipe cracking, and keeps your intercooler tract 100% clean.
Key Features
- Replaces the restrictive factory downpipe with a smooth 3" mandrel-bent design that cuts restriction and improves turbo-side flow.
- Swaps the factory up-pipes for heavy-duty 304 stainless piping that drops the failure-prone EGR riser and boosts flow to the turbo.
- Reroutes crankcase oil vapor away from the turbo intake to reduce buildup in the turbo, intercooler, and intake.
- Sharpens turbo response by clearing restrictions on both airflow paths for a crisper, more immediate throttle.
- Trims leak and failure points by cutting up-pipe cracking risks and keeping oil off the intake components.
FAQ
Q: Why replace the up-pipes and downpipe together?
A: The up-pipes feed exhaust energy into the turbo while the downpipe carries it away. Upgrading both improves airflow on both sides of the turbine, cutting restriction and avoiding repeat labor.
Q: What’s the main benefit of the CCV/PCV reroute?
A: The factory CCV sends oil vapor into the turbo intake, causing buildup. The reroute diverts crankcase vapor away from the intake, keeping the turbo and intercooler cleaner.
Q: Does the 3" downpipe require dropping the transmission?
A: No. Transmission removal isn’t needed, but clearance near the firewall and dipstick tube is tight. Pulling the heat shield and cutting the restrictive factory pipe makes removal easier.
Q: Does the driver-side up-pipe make a real difference?
A: Yes. The passenger pipe removes the crack-prone EGR riser, and the driver-side pipe evens out exhaust flow and pressure from both banks into the turbo, smoothing boost and reducing EGT spikes.
