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Ships within 48 hours · Estimated delivery Sep 18 - Sep 23
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Description
Sinister Diesel Coolant Reservoir Cap 17-23 GM 6.6L Duramax L5PFrustrated by the fragile plastic reservoir cap on your Duramax? Time to bite the billet and upgrade to Sinister Diesel's billet cap. The Sinister Diesel Coolant Reservoir Cap for your L5P Duramax is a high quality replacement billet cap designed to replace your factory cap. Made from high strength billet aluminum, this cap is build to last and withstand the rigors of daily use. The cap is precision machined to fit perfectly and ensuring a tight and
Frustrated by the fragile plastic reservoir cap on your Duramax? Time to bite the billet and upgrade to Sinister Diesel's billet cap.
The Sinister Diesel Coolant Reservoir Cap for your L5P Duramax is a high-quality replacement billet cap designed to replace your factory cap. Made from high-strength billet aluminum, this cap is build to last and withstand the rigors of daily use.
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
4.4 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 5
Good Salt Grinder
Size: 5.3 Inches - 1 Pack
Bought this for the pink salt. It crushes it nicely and is easy to fill. The crushing didn't change the taste and this holds a considerable amount of sale. It's a great value for the money and would make a terrific gift.
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Reviewed in the United States on February 14, 2026
★★★★★ 5
Works great!
Color: 1 pk
I almost returned this item because, as some others also mentioned, the top is very hard to remove. It needs a little indentation for your finger! But I liked the size and style so I persevered and once you remove it a few times, it eventually comes off easier.
This grinder works beautifully. It’s lovely on your table as well as your spice rack. The adjustable grind levels makes it easy to use and I highly recommend this item.
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Reviewed in the United States on April 16, 2026
★★★★★ 5
Exactly as I it hoped it to be!
Color: 1 pk
Such a great, little pepper grinder! Works very well and the adjustable grind size is a nice feature. Highly recommend if you need one that doesn't take up too much space.
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Reviewed in the United States on May 7, 2026
★★★★★ 4
much better than standard plastic cutting blades
Color: 2pk
They work well, and I'm not getting ground up plastic in my food.
One issue--the thin tops can be difficult to pry off, even with fingernails.
One of the tops came apart (metal cover, black plastic inner part), so I'll have to glue them together.
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Reviewed in the United States on December 28, 2025
★★★★★ 5
Grinds like a champ
Color: 2pk
It was meant to replace an older, different set of grinders, and so far, it's holding up well, and grinding the peppercorns easily. The salt crystals are mostly uniform, but that's OK since we don't use it as a finishing salt. If we ever need to replace them, which I hope not this soon, we'd buy this one again.
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Reviewed in the United States on May 23, 2026