Best in 7 days
![Holley EFI Lo-Ram Plenum; Cast Black; For Use w/PN[300-621BK]/GM LS1/LS2/LS3;](https://cdn.shopify.com/s/files/1/0710/3814/0738/products/300-604bk_09.jpg?v=1678924059)
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Ships within 48 hours · Estimated delivery Jul 8 - Jul 13
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Description
Holley EFI Lo-Ram Plenum; Cast Black; For Use w/PN[300-621BK]/GM LS1/LS2/LS3;The Holley LS1 2 6 Ultra Lo Ram intake manifold kits are designed for GM LS Gen III and IV engines equipped with GM LS1 2 6 (cathedral port) cylinder heads. These intake manifold and rail kits will work with OE or aftermarket cylinder heads. The 300 604 is the plenum top in the 300 621BK complete kit. Offering this separately allows you to select your components individually as you build your system. The Ultra Lo Ram intake manifolds are designed for
![Holley EFI Lo-Ram Plenum; Cast Black; For Use w/PN[300-621BK]/GM LS1/LS2/LS3;](https://cdn.shopify.com/s/files/1/0710/3814/0738/products/300-604bk_06.jpg?v=1678924059)
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]
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.2 ★★★★★
Based on 2079 reviews
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Product Reviews
★★★★★ 5
he Durable, Natural Chew That Finally Gives Peace of Mind
Size: Large
Why It's a Top-Tier Chew:
Truly Safe Ingredients (Plant-Powered): This is the biggest selling point. The HonestChew is made from food-grade, plant-based cellulose, vegetable oil, and real antler bone powder—no nylon, no petroleum, and no plastic. This means I can finally relax when my dog is relentlessly gnawing, knowing the ingredients are safe.
Engineered for Safety AND Toughness: The material is specifically designed to flake rather than splinter like hard bones or crack like many synthetic chews. This makes it a much safer choice for dental health and digestive safety, even for the most aggressive chompers. It has the feel of a hard chew but with a safer breakdown.
Irresistible to Dogs: The chew is infused with real antler powder, giving it a natural, gnaw-worthy scent and flavor that keeps my dog engaged for long periods. The curved, ergonomic Infinity shape is excellent for dogs to grip securely with their paws, promoting a comfortable chewing posture.
Dental Support: The nubs and ridges on the surface aren't just for looks; they provide a gentle scraping action that helps scrub away plaque and tartar buildup on the teeth and above the gumline while the dog is happily playing.
Who Needs This?
If you have a dog that quickly destroys "indestructible" toys, swallows rawhide too fast, or causes you stress with the risk of bone splintering, the WOOF HonestChew Infinity is the perfect solution. It stands up to serious chewing and satisfies that innate gnawing instinct with confidence.
A highly recommended, long-lasting, and thoughtfully designed product that puts pet health first.
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Reviewed in the United States on October 22, 2025
★★★★★ 5
Great toy for super chewers!!
Size: Large
My dog is a super chewer and he enjoys these so much. I do too cause I feel like my money is actually getting spent well than on a plush toy he’ll destroy in two seconds. Definitely recommend these all the time for anyone who has that same issue with their pets. Very durable and perfect size for my big pit.
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Reviewed in the United States on June 2, 2026
★★★★★ 4
My dog loves this toy and she hasn’t chewed it up yet.
Size: Medium
This is a good chew toy for my aggressive chewer. I bought the large size for my medium size dog.
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Reviewed in the United States on June 5, 2026
★★★★★ 5
My Samoyed loved this!
Size: Medium
My dog’s favorite thing. This is his 4th toy and he loves it. The quality is great and it lasts very long. Definitely worth every penny you spend. It keeps my samoyed engaged every morning and every night. There is no choke hazard, so all dogs can use it
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Long lasting
Size: Medium
My dogs love these and they last pretty long. I take them away when they get very small so I think they’re pretty safe.
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Reviewed in the United States on May 27, 2026
