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- USA
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Ships within 48 hours · Estimated delivery Jul 19 - Jul 24
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For Your Every Summer RSVP, with Code: SUMMER15
Description
Fleece Performance Freedom Series Cylinder Head 17-23 GM 6.6L Duramax L5PGive your 2017 2023 6. 6L GM Duramax L5P the boost it deserves with the Fleece Performance Freedom Series Cylinder Head. With your choice of side or both the driver side (left) and passenger side (right), these cylinder heads are precision engineered to enhance airflow, delivering improved combustion and unlocking additional power for your truck. Whether youre hauling, towing, or just want that extra edge, this upgrade helps your Duramax breathe
Give your 2017-2023 6.6L GM Duramax L5P the boost it deserves with the Fleece Performance Freedom Series Cylinder Head. With your choice of side or both the driver side (left) and passenger side (right), these cylinder heads are precision engineered to enhance airflow, delivering improved combustion and unlocking additional power for your truck. Whether you’re hauling, towing, or just want that extra edge, this upgrade helps your Duramax breathe better and perform stronger.
Built in Fleece’s state-of-the-art Freedom Racing Engine shop, each cylinder head is crafted from a remanufactured OE casting and rigorously inspected, pressure tested, and leak tested to ensure top notch reliability. Outfitted with brand new valves, valve guides, springs, and valve seals, these heads deliver optimal performance for heavy duty or daily driving.
No core charge means an easy, hassle free upgrade. For the best fit and seal, pair with a GM head gasket (Grade C, 12727486). Take your Duramax to the next level with superior airflow, better power delivery, and the dependability to handle the toughest jobs.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 18 reviews
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Product Reviews
★★★★★ 5
Appearance
Size: 8, Color: Tan
Looks better in person
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Reviewed in the United States on May 31, 2026
★★★★★ 5
very good
Size: 7.5, Color: Cognac
veryyyy gooood
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Reviewed in the United States on January 29, 2026
★★★★★ 5
Nice shoes
Size: 9, Color: Cognac
My Husband loves it 😍
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Reviewed in the United States on January 11, 2026
★★★★★ 4
I just need the size 12
Size: 12, Color: Tan
Gm.i made a mistake the first time when I order the size 13. I return it because it was to big .so I reorder a size 12 now am looking at my order they still sending me the same size 13 i will have to return it again because it is to big sorry I dont know what going
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Reviewed in the United States on May 8, 2026
★★★★★ 3
Worth the price
Size: 10, Color: Tan
A little tie on the valley,
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Reviewed in the United States on May 20, 2026