Fleece FPE-61-10014-P Freedom Series Duramax Cylinder Head (Passenger Side) | 2017-2023 GM Silverado/Sierra 2500/3500 6.6L L5P Duramax

Features:

• Fits 2017–2023 L5P 6.6L Duramax engines
• Direct passenger side cylinder head replacement
• Re-manufactured OE casting for factory fit
• Equipped with new valves and guides
• Includes new springs and valve seals
• Pressure and leak tested for durability
• Multi-angle valve job for improved airflow
• No core charge required at purchase
• Perfect for daily driving or towing
• Built in Freedom Racing Engine facility
• Recommended with GM Grade C head gasket
• Covered by 1-year limited parts warranty

Restore The Power Your Duramax Was Built For

When your Duramax starts losing its edge, whether it’s struggling with a heavy trailer or just not idling the way it should, it might be time to look at the heart of the engine. The Fleece Freedom Series Cylinder Head for the passenger side is built to bring your L5P back to life with the kind of strength and reliability you expect from a daily driver or a hard-working tow rig. Every head is crafted in Fleece’s Freedom Racing Engine shop, where attention to detail is second to none. What you get is not just a replacement part, but a fully rebuilt head equipped with new valves, valve guides, springs, and seals. That means smoother performance, cleaner starts, and the confidence to push your truck without worrying about weak spots holding you back. There’s no core charge to hassle with either, so it’s a straightforward purchase that gets you back on the road faster. If you want a cylinder head that delivers both peace of mind and proven performance, this one checks all the boxes.

Precision Engineering That Meets And Exceeds Factory Standards

The Freedom Series Cylinder Head from Fleece is designed for the 2017–2023 L5P Duramax and built with a focus on exacting specifications. Starting with a re-manufactured OE casting, the head is carefully machined and inspected to ensure it matches or surpasses factory requirements. Each head goes through pressure and leak testing to confirm it can handle the stress of daily driving, towing, or performance upgrades. A multi-angle valve job is performed to improve airflow efficiency, which helps maintain clean combustion and consistent power. New valves, guides, springs, and seals are already installed, eliminating the guesswork and giving you a ready-to-install unit. Fleece also recommends using the GM Grade C head gasket (12727486) to ensure the best possible seal once installed. With a one-year limited parts warranty and the backing of Fleece’s reputation for diesel precision, this cylinder head offers both the reliability and the engineering detail needed to keep your Duramax running strong.

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

Notes:

• Fits 2017–2023 Silverado and Sierra 2500HD/3500HD 6.6L L5P Duramax.
• Passenger side cylinder head only, confirm side before ordering.
• Manufactured in Fleece’s Freedom Racing Engine facility for quality assurance.
• Built from a re-manufactured OE casting to match factory specs.
• Comes with new valves, guides, springs, and seals pre-installed.
• Each head is pressure and leak tested for reliability.
• Multi-angle valve job helps improve airflow and efficiency.
• No core charge required, you keep your original head.
• Recommended for use with GM Grade C head gasket (12727486).
• Professional installation by an experienced diesel technician is advised.
• Backed by a one-year limited parts warranty.