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Ships within 48 hours · Estimated delivery Jul 20 - Jul 25
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For Your Every Summer RSVP, with Code: SUMMER15
Description
Twin Power 66-84 Shovelhead Big Twin Head Gasket Std Bore .040 MLS Replaces H-D 16770-66 PrUpgrade your vintage Shovelhead Big Twin engine with the TwinPower 66 84 Head Gasket. Designed specifically for standard bore sizes with a 040 MLS thickness, this high quality gasket ensures superior sealing for optimal engine performance and reliability. Crafted as a precise replacement for the Harley Davidson 16770 66 part, it maintains the integrity of your engine's cylinder head, preventing leaks and enhancing durability under demanding
Upgrade your vintage Shovelhead Big Twin engine with the TwinPower 66-84 Head Gasket. Designed specifically for standard bore sizes with a 040 MLS thickness, this high-quality gasket ensures superior sealing for optimal engine performance and reliability.Crafted as a precise replacement for the Harley-Davidson 16770-66 part, it maintains the integrity of your engine's cylinder head, preventing leaks and enhancing durability under demanding conditions. Trust TwinPower to deliver components that meet the needs of enthusiasts and professionals alike.
Whether you're rebuilding, repairing, or tuning your classic motor, this head gasket is engineered to provide a perfect fit and consistent performance. Invest in quality and keep your Big Twin running smoothly with this essential engine component, exclusively available for enthusiasts seeking reliability and excellence.
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
4.1 ★★★★★
Based on 15 reviews
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Product Reviews
★★★★★ 5
Satisfied
Color: Brown, White, Black, Size: Large
Nice fit and comfortable
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2026
★★★★★ 5
Nice material, holds collar shape well.
Color: Wine Red, Navy Blue, Black, Size: Medium
Good value for the money. You can machine wash and dry on low heat, in my opinion. Laying flat is too much of a pain.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 30, 2026
★★★★★ 5
Great tshirts!
Color: Light Gray, Dark Gray, Black, Size: X-Large
Husband loved these tshirts.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 18, 2026
★★★★★ 2
Not made from the most comfortable fabric
Color: White, Light Gray, Black, Size: Large
It is not the most comfortable fabric which makes it not suitable for summer clothing. Also, the fitting of the neck doesn’t look good since material is not wrinkle free
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Reviewed in the United States on August 4, 2025
★★★★★ 4
Excellent Mock Neck T-Shirts
Color: Wine Red, Navy Blue, Black, Size: Medium
As a man who appreciates comfort and style, I can confidently say these August Alley mock neck t-shirts are a solid choice. I'm always looking for versatile basics, and these fit the bill perfectly.
The cotton material feels great against the skin, and they've held their shape well after a few washes. I appreciate the slim fit; it looks modern without being too tight. Whether I'm wearing them casually or layering them under a jacket, they always look sharp.
For the price, getting a 3-pack of these quality shirts is a fantastic deal. Highly recommend them for any guy looking to upgrade his basic tee collection.
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Reviewed in the United States on June 24, 2025
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