CSF B58 thermal rejection competition spacer, a 6.5mm intake-manifold spacer for the BMW/Toyota B58 motor (use with CSF Super Manifold #8200). It is molded from KIYLEX, a high-performance polymer as strong as aluminum that withstands up to 1100°F, and acts as a thermal barrier between the cylinder head and intake manifold to cut conductive heat transfer. This lowers manifold and intake air temperatures (proven up to 15% lower), improves charge-cooler efficiency and fights heat soak. Self-sealing — no gaskets needed; includes install hardware and instructions. Does not fit the OEM manifold.
| Type | B58 intake manifold thermal spacer |
| Material | KIYLEX high-performance polymer |
| Height | 6.5mm |
| Temp rating | Up to 1100°F |
| Benefit | Lowers IAT up to 15%, fights heat soak |
| Use with | CSF B58 Super Manifold #8200 |
| Note | Does not fit OEM manifold |
| Warranty | Limited lifetime |
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 |
| 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 |
