Notifications
The LBZ Duramax (2006-2007) is one of the most reliable diesel engines from GM, but it still has factory restrictions that limit performance. One of the best modifications for improving power, reliability, and efficiency is the Up Pipe & EGR Delete.
This guide covers everything you need to know about LBZ Up Pipe and EGR Delete, including benefits, installation, legal considerations, and performance gains.
The factory lbz up pipe egr delete on the LBZ Duramax connects the turbocharger to the exhaust manifold. The stock up pipe is prone to cracking and leaks due to thin materials and restrictive design.
An aftermarket up pipe is built with thicker, high-quality steel to improve durability and flow.
The Exhaust Gas Recirculation (EGR) system recirculates exhaust gases back into the intake to reduce emissions. However, this system causes:
Carbon buildup in the intake
Reduced engine efficiency
Higher engine temperatures
An EGR delete removes this system entirely, improving performance and engine longevity.
The up pipe upgrade reduces exhaust restriction, allowing the turbo to spool faster.
The EGR delete eliminates hot exhaust gas recirculation, improving combustion efficiency.
Without the EGR system, the engine runs cooler, reducing stress on components.
Prevents carbon buildup in the intake manifold and valves.
Less exhaust restriction and better combustion lead to better MPG.
Eliminates risk of EGR cooler failure (a common issue in Duramax engines).
Stops up pipe cracks that can cause boost leaks.
Federal Law (USA): Removing emissions equipment is illegal for on-road vehicles.
Off-Road & Competition Use Only: Many truck owners use EGR deletes for off-road or racing applications.
State Inspections: Some states (like California) have strict emissions testing—deleted trucks may fail.
Some tuners offer EGR-off tuning, which keeps the system intact but disables its function.
This avoids physical removal but still improves performance.
Socket set & wrenches
Torque wrench
New up pipe & EGR delete kit
Intake manifold gaskets (recommended)
Disconnect the negative battery terminals.
Remove the air intake system and charge pipes for better access.
Unbolt the up pipe from the turbo and exhaust manifold.
Some trucks may require loosening the turbo for clearance.
Fit the new up pipe with proper gaskets.
Torque bolts to manufacturer specs (usually 25-30 ft-lbs).
Remove the EGR valve, cooler, and associated piping.
Install the EGR delete block-off plates where necessary.
Cap or reroute coolant lines if the EGR cooler was deleted.
Reinstall the intake and charge pipes.
Flash a custom tune to disable EGR-related codes (if needed).
High-quality 304 stainless steel construction.
Improves flow and eliminates cracking issues.
Includes block-off plates and necessary hardware.
Durable and easy to install.
Offers emissions-compliant alternatives for some applications.
The LBZ Up Pipe & EGR Delete is one of the best modifications for improving performance, reliability, and efficiency in your Duramax. While the EGR delete has legal implications, the benefits—better throttle response, reduced engine temps, and increased longevity—make it a popular choice among diesel enthusiasts.