GMC Sierra 2500 HD Intercooler Pipe - Passenger Side - Wehrli - 3 in. High Flow Upper Crossover - Bengal Grey - 2011–2016. A direct-fit upper crossover pipe designed to improve airflow and keep factory connections on LML Duramax trucks.

Built from 14-gauge aluminum and finished in durable Bengal Grey powder coat, this pipe reduces restriction compared to stock for sharper turbo response. It connects to the factory throttle valve and grid heater, works with the OEM Y-bridge, and includes a billet turbo resonator plate for a cleaner install and a more pronounced turbo/engine note. No tuning required and installs with basic hand tools. Pairs well with emissions-compliant tuning and drop-in turbos. Replaces GM PN 12642321. Made in the USA.

Features

• 3 in. high-flow upper intercooler crossover, passenger side
• For 2011–2016 Duramax LML (GMC Sierra 2500 HD)
• 18% gain in airflow over stock
• Compatible with OEM Y-bridge
• Connects to factory throttle valve and grid heater
• Includes billet turbo resonator plate
• 14-gauge aluminum; Bengal Grey powder coat
• No tuning required; bolt-on install

Have questions or planning a build? Call our Austin, TX team at 512-982-9393 or our Los Angeles, CA area team at 562-981-6800. We offer installation and customization services at both locations.

If you are considering multiple items, contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov