Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 12 - Jul 17
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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
4.2 ★★★★★
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Product Reviews
★★★★★ 5
Fair quality shirt
Size: Large, Color: Port Red
Decent shirt. No shirt if wrinkle-free so take these claims with a grain of salt. The fabric blend will tell you just how much it will wrinkle. If you leave it in the dryer overnight you can guarantee that even if it was made of cast iron, it would likely have a wrinkle or two.
Don't be swayed by a 'label'. The same shirt can have a no-name label sewn on it. Doesn't make the shirt better or worse. It is what it is. Size runs correct. NOT a 'slim fit' shirt, fyi.
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Reviewed in the United States on April 1, 2024
★★★★★ 5
Good cheap watch
Color: Black Black
Nice cheap watch that gets the job done and looks good
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Reviewed in the United States on April 16, 2026
★★★★★ 3
Two tone color
Color: Silver GunColor, Color: Silver GunColor
I guess it’s good enough for what you pay but the band and base of the watch color do not match and it’s noticeable.
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Reviewed in the United States on December 8, 2025
★★★★★ 5
Good quality
Color: Gold Black
Nice watch
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Reviewed in the United States on December 28, 2025
★★★★★ 5
Great watch for preteen and above
My 12yo loves this. It’s stylish, durable and a great quality.
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Reviewed in the United States on November 9, 2025