SKU: 51297274673

Cometic Chevrolet Mark-IV, GM Gen-V/VI Big Block V8 .040" MLS Cylinder Head Gasket, 4.570" Bore, For Aftermarket Heads - Undersized Water Ports to Allow for Customization

$81.48 $90.53
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Ships within 48 hours · Estimated delivery Sep 3 - Sep 8

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Description

Cometic Chevrolet Mark-IV, GM Gen-V/VI Big Block V8 .040" MLS Cylinder Head Gasket, 4.570" Bore, For Aftermarket Heads - Undersized Water Ports to Allow for Customization** MADE TO ORDER, EXPECT 1 2 WEEK DELAY ** Cometic Multi Layer Steel gaskets are comprised of multiple embossed layers of both proprietary high temperature coated and uncoated stainless steel, requiring less clamp load, creating less bore distortion, and conforms load distribution across the sealing area. An additional HP Shim Layer can be added to provide increased stress around the combustion seal. Proprietary high temperature coatings along with

** MADE TO ORDER, EXPECT 1-2 WEEK DELAY **

Cometic Multi-Layer Steel gaskets are comprised of multiple embossed layers of both proprietary high temperature coated and uncoated stainless steel, requiring less clamp load, creating less bore distortion, and conforms load distribution across the sealing area.
An additional HP Shim Layer can be added to provide increased stress around the combustion seal. Proprietary high temperature coatings along with embossments provide a micro seal for fluids against the head and block surface.

Features:

Material: MLS
Compressed Thickness: .040
Bore Shape: Valve Pocketed
Bore Size (IN): 4.570
# of layers: 3
Orientation: None

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 51297274673

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4.9 ★★★★★
Based on 26 reviews
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C
Verified Purchase
Charlow
Alexandria, US
★★★★★ 3
Glow in the Dark Balls
Color: 2-Pack (3" Balls)
These balls are ok, not great. The reason they didn’t receive 5 stars is because they are hard/stiff, harder to throw & heavier than the the “Chuck It” glow in the dark balls. They did not hold up to heavy chewers as well as the aforementioned balls.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
L
Verified Purchase
Leslie Guffey
Alexandria, US
★★★★★ 5
Light up and glow in the dark ball
Size: One-Size-for-Most
Definitely my girls favorite ball 😀. It disappears and I have to buy another one or she goes nuts. Glows in the dark, brighter with more sun. The bounce light up don’t last a real long time, too quick to quit for her but still loves it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
A
Verified Purchase
AirNelson
Alexandria, US
★★★★★ 5
Durable & Bright - Great for Heavy Chewers
Size: One-Size-for-Most
Pros: Extremely Durable: Survived an aggressive chewer where tennis balls failed. Dual-Visibility: Features both internal flashing lights and a glow-in-the-dark "chargeable" surface. Perfect Size: Fits comfortably in the mouth of a 40lb medium-sized dog. Same size as a tennis ball. Cons: Battery Life: Unsure how long the internal flashing lights will last (though it has held up well so far).
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Reviewed in the United States on February 8, 2026
A
Verified Purchase
Andrea S.
Natrona Heights, US
★★★★★ 5
Great for night time play!
Size: One-Size-for-Most
This ball is great! It is a 2-for-one light up feature so we love the flashing lights and if she drops it in the snow after those lights stop, we can still find it because of the strong glow that gets its charge from the flashing LED lights. Our first one lasted a few years, we lost it on a trip so now back for our second one so we can keep the night time fetch going! She is a golden retriever for size reference. Any bigger of a breed and I would worry it might be too small for her mouth. It’s a bit smaller than a tennis ball. Just don’t make the same mistake I did and let them have it in the house at night, she walked up to my bedside while I was asleep one night and squeezed it to activate it. Those lights are so bright it was a rude awakening!
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Reviewed in the United States on November 11, 2025
K
Verified Purchase
Katie
Belleville, US
★★★★★ 4
Good option for playing at night
Size: One-Size-for-Most
This ball is a good option if your dog likes to fetch at night. It stays lit for about 20 minutes or so, but that is me only leaving it out of the counter, being "charged" by whatever house lights are on. My dog isn't a big chewer, but it seems as though it would hold up well. I like that it is easy to rinse and clean. It seems to be a good value.
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Reviewed in the United States on January 16, 2026

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