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Description
CSF B58 Thermal Rejection Competition Spacer (For Super Manifold 8200)The CSF B58 Thermal Rejection Competition Spacer is the next level upgrade for the B58 Super Manifold (CSF #8200). Made from KIYLEX, a patented revolutionary high performance final stage polymer. KIYLEX is as strong as aluminum and can withstand temperatures up to 1100'F. This spacer is designed to insulate the intake manifold from conductive heat transfer from the cylinder head. This thermal barrier reduces manifold temperatures which helps lower
The CSF B58 Thermal Rejection Competition Spacer is the next level upgrade for the B58 Super Manifold (CSF #8200). Made from KIYLEX, a patented revolutionary high-performance final stage polymer. KIYLEX is as strong as aluminum and can withstand temperatures up to 1100'F. This spacer is designed to insulate the intake manifold from conductive heat transfer from the cylinder head. This thermal barrier reduces manifold temperatures which helps lower Intake Air Temperatures (IATs), improve charge air cooler efficiency, and combats heat soak. CSF is the exclusive distributor for the KIYLEX Intake Manifold Spacer for the B58 Motor.This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2020-2023 | BMW | 540i | Base |
| 2020-2023 | BMW | 540i xDrive | Base |
| 2018-2022 | BMW | 740i | Base |
| 2018-2022 | BMW | 740i xDrive | Base |
| 2020-2022 | BMW | 745e xDrive | Base |
| 2020-2025 | BMW | 840i | Base |
| 2020-2025 | BMW | 840i Gran Coupe | Base |
| 2020-2025 | BMW | 840i xDrive | Base |
| 2020-2025 | BMW | 840i xDrive Gran Coupe | Base |
| 2023-2025 | BMW | M240i | Base |
| 2022-2025 | BMW | M240i xDrive | Base |
| 2020-2024 | BMW | M340i | Base |
| 2020-2024 | BMW | M340i xDrive | Base |
| 2021-2024 | BMW | M440i | Base |
| 2022-2024 | BMW | M440i Gran Coupe | Base |
| 2021-2024 | BMW | M440i xDrive | Base |
| 2022-2024 | BMW | M440i xDrive Gran Coupe | Base |
| 2020-2024 | BMW | X3 | M40i |
| 2020-2025 | BMW | X4 | M40i |
| 2020-2023 | BMW | X5 | sDrive40i |
| 2019-2022 | BMW | X5 | xDrive40i |
| 2021-2023 | BMW | X5 | xDrive45e |
| 2020-2021 | BMW | X6 | sDrive40i |
| 2020-2023 | BMW | X6 | xDrive40i |
| 2019-2023 | BMW | X7 | xDrive40i |
| 2022-2026 | BMW | Z4 | M40i |
| 2024-2026 | INEOS | Grenadier | Base |
| 2024-2026 | INEOS | Grenadier | Fieldmaster |
| 2024-2026 | INEOS | Grenadier | Trialmaster |
| 2025-2026 | INEOS | Grenadier Quartermaster | Base |
| 2025-2026 | INEOS | Grenadier Quartermaster | Fieldmaster |
| 2025-2026 | INEOS | Grenadier Quartermaster | Trialmaster |
| 2024 | Toyota | GR Supra | 45th Anniversary Edition |
| 2021-2022 | Toyota | GR Supra | A91 Edition |
| 2023 | Toyota | GR Supra | A91-MT Edition |
| 2020-2026 | Toyota | GR Supra | Base |
| 2020 | Toyota | GR Supra | Launch Edition |
| 2026 | Toyota | GR Supra | MkV Final Edition |
| 2020-2026 | Toyota | GR Supra | Premium |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.6 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 5
Timeless Elegance & Exceptional Value – Lab Grown Perfection
Color: Yellow Gold, Size: 1 cttw
Rating: ⭐⭐⭐⭐⭐
As someone who values both aesthetic beauty and ethical sourcing, I am incredibly impressed with these Amazon Essentials Lab Grown Diamond Studs. While some might be hesitant about "Amazon jewelry," the quality of these earrings rivals high-end boutique pieces at a fraction of the cost.
Certified Brilliance
The fact that these are IGI Certified is a game-changer. It provides total peace of mind regarding the G-H color and VS1-VS2 clarity.
• Sparkle: The round cut is precise, offering incredible fire and light dispersion. They don't have that "glassy" look often found in lower-quality stones; they look like pure, high-end brilliance.
• Clarity: Under a jeweler's loupe, the stones are remarkably clean. To the naked eye, they are absolutely flawless.
Premium Materials & Ergonomics
The setting is just as important as the stone, and Amazon didn't cut corners here:
• 14k Gold Construction: The 14k gold is sturdy and polished to a high mirror finish. It’s hypoallergenic, which is essential for long-term daily wear.
• The 4-Prong Setting: This classic "basket" style is awesomely functional, holding the diamond securely while allowing maximum light to enter from the sides.
• Comfortable Fit: The posts are the perfect length—long enough to be secure but not so long that they poke you while sleeping or using a phone.
An Essential Wardrobe Staple
These earrings are a gorgeous addition to any collection. They are the definition of an absolutely essential tool for effortless style, whether for everyday wear or special occasions.
Final Verdict:
These earrings represent a perfect marriage of professional-grade certification and accessible luxury. They are functional, stunning, and ethically sound. If you want the look of a $2,000 pair of studs for a surgical price point, these are the ones to get.
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Reviewed in the United States on December 28, 2025
★★★★★ 5
Shine bright like a diamond 💎!!!
Color: Yellow Gold, Size: 0.25 cttw, Color: Yellow Gold, Size: 0.25 cttw
Absolutely stunning earrings! ✨ I am beyond happy with this purchase. The brilliance and sparkle are incredible—they catch the light beautifully and look just as radiant as (if not more than) traditional diamonds. The 0.25 are just the right size. The round cut and 4-prong setting really showcase the stones, giving them a classic, elegant look that works for both everyday wear and special occasions.
I also love that these are lab-grown diamonds. Being able to choose something that is both ethically and environmentally conscious makes them even more special to me. The quality is excellent—the clarity and color are exactly as described, and they truly look flawless to the eye.
They feel secure, well-made, and luxurious without the excessive price tag. If you’re looking for timeless, high-quality diamond studs with a modern, responsible touch, these are an amazing choice. So shiny, so bright—I couldn’t be happier!
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Reviewed in the United States on May 4, 2026
★★★★★ 5
Diamonds Are Always A Girl”s Best Friend!
Color: White Gold, Size: 0.25 cttw
Super cute, cost-effective and no irritation to my ear lobes! No one can tell the difference! Will be purchasing manufactured diamond earrings from now on!
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Beautiful and nice!
Color: White Gold, Size: 0.25 cttw
I wear these every day! Very nice!
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Reviewed in the United States on May 31, 2026
★★★★★ 5
Great purchase! Highly recommend!
Color: Yellow Gold, Size: 1 cttw
Love these earrings! They have beautiful brilliance and sparkle AND I feel the setting is relatively substantial. They have a screw on back and the back is not small and flimsy like some earring backs I have seen. I purchased the 1 carat pair and love them. Highly recommend!
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Reviewed in the United States on March 15, 2026