CSF Radiators BMW B58 Gen2 Thermal Rejection Competition Charge Air Manifold Spacer

CSF B58 Thermal Rejection Competition Spacer – The Ultimate Heat Barrier

The CSF B58 Thermal Rejection Competition Spacer is the ultimate performance upgrade for the B58 Super Manifold (CSF #8200), designed to deliver superior thermal management for track and street use. Made from KIYLEX, a patented, high-performance polymer as strong as aluminium and capable of withstanding temperatures up to 1100°F, this spacer reduces heat transfer between the intake manifold and cylinder head.

By creating a thermal barrier, the CSF Thermal Rejection Spacer helps lower intake manifold temperatures by up to 15%, improving Intake Air Temperatures (IATs), enhancing charge air cooler efficiency, and mitigating heat soak. This upgrade is especially beneficial during drag and roll-racing events, where vehicles often idle in staging lanes, causing significant heat soak in the liquid-to-air manifold.

Paired with the CSF B58 Super Manifold, the spacer ensures peak performance by reducing the heat transfer caused by aluminium’s high thermal conductivity. Proven in motorsports and tested by industry leaders like Visconti Tuning, this spacer is essential for drivers seeking a competitive edge.

Key Features

• KIYLEX Construction: Revolutionary polymer as strong as aluminium, withstanding up to 1100°F.
• Thermal Barrier Design: Dissipates heat between the cylinder head and manifold, reducing temperatures by up to 15%.
• Improved IATs: Keeps intake air cooler for enhanced performance and charge air efficiency.
• Motorsports Proven: Ideal for drag racing, roll racing, and competitive events to combat heat soak.
• Self-Sealing Design: No gaskets, silicone products, or sealing agents required.
• Plug-and-Play Installation: Includes hardware and instructions for a seamless fit.
• Durable Construction: Designed for long-lasting performance with a lifetime warranty.
• Compatibility: Specifically engineered for use with the CSF B58 Super Manifold (not compatible with OEM manifold).

Applications

This thermal rejection spacer is compatible with a wide range of BMW B58-powered vehicles and the Toyota GR Supra, including:

• BMW G20 M340i / G22 M440i / G42 M240i (2020-2024)
• BMW G05 X5 xDrive40i / G06 X6 xDrive40i / G29 Z4 M40i (2020-2024)
• Toyota GR Supra A91-MT, Premium, and 45th Anniversary Editions (2020-2024)

Refer to the detailed application list for full compatibility.

Why Choose CSF?

The CSF B58 Thermal Rejection Competition Spacer is more than just an upgrade—it's a game-changer for reducing heat soak and improving performance. Whether you're tackling the track or enhancing your daily driver, this spacer ensures your BMW or Toyota GR Supra runs cooler, stronger, and more efficiently.

Upgrade today and experience the CSF difference in thermal management and performance excellence.

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.