MAP Sensor Spacer with Boost Reference Port

Features:

• Moves MAP sensor out of the airflow path
• Reduces soot buildup on MAP sensor
• Lowers sensor maintenance and cleaning needs
• Extends sensor life and reliability
• Includes 1/8in NPT boost reference port
• Allows for auxiliary boost sensor install
• CNC-machined spacer block construction
• Includes seal ring and O-ring port plug
• Simple bolt-on installation
• Designed specifically for L5P Duramax

Get Your MAP Sensor out of the Way with Fleece

If you’re tired of constantly pulling your MAP sensor to clean off stubborn soot buildup, the Fleece MAP Sensor Spacer with Boost Reference Port is a smart, hassle-saving upgrade for your L5P Duramax. This little spacer solves a frustrating issue built into the factory design, where the MAP sensor is positioned directly in the intake air stream, constantly getting coated with soot over time. It’s a known problem, and it doesn’t take long before sensor readings are off or the truck starts throwing codes. Fleece’s spacer simply relocates the MAP sensor slightly out of that direct airflow path. That small change makes a big difference in how often you need to deal with soot buildup. You’ll spend less time cleaning or replacing sensors, and your truck will be less likely to run into false boost readings or reduced performance caused by a dirty MAP sensor. It’s a clean, effective fix that helps your truck run more consistently.

Built-In NPT Boost Reference Port

On top of all of that, this spacer also includes a built-in 1/8in NPT boost reference port. That’s perfect if you plan to run an auxiliary boost gauge, aftermarket controller, or want a clean way to monitor boost for tuning or logging purposes. You won’t have to drill or tap anything else, Fleece already did the work for you. Best of all, installation is straightforward and comes with everything you need, including the mounting block, fastener, seal ring, and O-ring port plug. Once installed, it tucks in neatly and doesn’t interfere with any other components. It's a small upgrade with real-world value, especially if you’re running your truck hard or just want to cut back on unnecessary maintenance.

Fitment: 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax L5P

Notes:

• Relocates MAP sensor to reduce soot exposure
• CARB EO#: D-834-23
• Helps prevent false boost readings and CELs
• Reduces frequency of sensor cleaning and replacement
• Improves long-term reliability of MAP sensor
• Includes 1/8" NPT port for auxiliary boost monitoring
• Perfect for tuning, logging, or boost gauge installs
• No drilling or tapping required, fully pre-machined
• Includes all necessary seals, hardware, and plug
• Simple bolt-on installation with OEM-like fit
• Designed specifically for 2017–2024 L5P Duramax trucks