Garrett PowerMax 6.6L Duramax LML Turbo Upgrade suitable for Chevrolet and GMC 2500HD 3500HD 2011-2016

Garrett PowerMax 6.6L Duramax LML Turbo Upgrade suitable for Chevrolet and GMC 2500HD 3500HD 2011-2016

Garrett PowerMax turbocharger upgrade suitable for the 6.6L Duramax LML diesel in the Chevrolet and GMC 2500HD and 3500HD. It is a direct drop-in stage 1 upgrade that keeps the OEM installation, flows 19% more than the OEM turbo and supports up to 600HP. The gains come from a lightweight, forged, fully machined compressor wheel.

🚗 Suitable for:

• Chevrolet 2500HD and 3500HD 6.6L Duramax LML (2011-2016)
• GMC 2500HD and 3500HD 6.6L Duramax LML (2011-2016)

📦 What’s Included:

• 1x Garrett PowerMax turbocharger (part number 886976-5004S)

🔧 Fitment Details:

• Direct drop-in replacement. Outline interchangeable with the factory turbo for a perfect fit
• We recommend dyno tuning for best results

⚙️ Why Choose Garrett PowerMax:

• 19% more flow than the OEM turbo
• Forged, fully machined compressor wheel
• Supports up to 600HP
• Keeps the OEM installation specifications

📐 Specifications:

• Turbo model: GT3788VA
• Power capability: up to 600HP

📄 Garrett Product Flyer:
See Garrett’s own flyer for this turbo, with the compressor map and full specifications.
View the Garrett PowerMax flyer, page 1
View the Garrett PowerMax flyer, page 2

❓ FAQs:
Q: Is this a direct bolt-on?
A: Yes. It is outline interchangeable with the factory turbo, so it fits in place of the original with no fabrication.

Q: Do I need a tune?
A: Garrett’s power figure is the turbo’s capability from flow testing, and real results depend on your vehicle’s modifications and tune. We recommend dyno tuning for best results.