PPE 115010000 Turbo Inlet Upgrade Kit | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Features:

• Fits 2004.5–2005 LLY 6.6L Duramax engines
• Replaces restrictive factory turbo inlet design
• Improves turbo airflow and response
• Reduces low-pressure turbulence at turbo inlet
• LBZ/LMM-style upgrade for enhanced efficiency
• Increases overall performance and drivability
• Optimizes boost potential under load
• Supports upgraded or stock turbo setups
• Ideal for tuned or performance-enhanced trucks
• Simple upgrade with significant airflow gains

Unleash The True Power Of Your Turbo

If you're driving a 2004.5–2005 LLY Duramax, there's a good chance you're leaving performance on the table without even knowing it. The factory turbo inlet on these trucks creates a low-pressure zone that holds back boost and limits your power potential. The PPE Turbo Inlet Upgrade Kit fixes that issue by replacing the restrictive stock design with a high-flow, LBZ/LMM-style upgrade. That means better throttle response, stronger acceleration, and a more efficient turbo that can finally breathe the way it was meant to. This is one of those upgrades that you’ll actually feel from the driver’s seat, whether you’re towing up a steep grade or opening it up on a highway pull. It’s simple to install but delivers results that punch well above its weight. If you want to wake up your LLY with a quick bolt-on upgrade, this inlet kit is the key to doing it right.

Designed To Improve Flow And Eliminate Restriction

The PPE 115010000 Turbo Inlet Upgrade Kit is engineered to eliminate the performance limitations caused by the factory turbo inlet found on 2004.5–2005 GM 2500HD and 3500HD trucks equipped with the 6.6L LLY Duramax. The OEM inlet is known for generating a low-pressure pocket in front of the turbocharger, reducing airflow and creating turbulence that compromises turbo efficiency. This upgrade replaces that restrictive design with a smoother, more direct inlet path modeled after the higher-performing LBZ and LMM configurations. By reducing inlet resistance, it allows the turbo to spool more efficiently, improving boost response and supporting increased airflow for both stock and tuned applications. The design is ideal for anyone running performance modifications or simply looking to enhance drivability and engine responsiveness. This kit offers a reliable way to maximize your existing turbo's capability without needing a full replacement. Built for function and flow, it’s a smart solution to a known bottleneck in the LLY platform.

Fits: 2004, 2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Notes:

• Designed specifically for 2004.5–2005 LLY Duramax engines
• Replaces factory inlet that restricts airflow and creates a low-pressure zone
• Utilizes LBZ/LMM-style inlet geometry for improved performance
• Optimizes airflow to the turbocharger for better boost response
• Helps improve acceleration and overall turbo efficiency
• Compatible with stock and upgraded turbo configurations
• Intended as a direct-fit upgrade for improved drivability
• Not compatible with non-LLY Duramax engine models
• Ideal for tuned or performance-modified trucks seeking better flow