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Your Vehicle BMW E71 X6 M S63 4.4L

B58 Thermal Rejection Competition Spacer

Also known as a "Phenolic Spacer", this prevents heat transfer from the head to the intake manifold to reduce intake air temperatures (IATs)
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Designed to be used with CSF's B58 Super Manifold (CSF #8200 - ES4389640 or #8200B - ES4619750)
CSF
Mfg Part #
8200S
ECS Part #
ES#4608346
Brand
CSF

299.00
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on orders $49 and up
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Product Details

2X Entries For Our 25th Anniversary Sweepstakes!
Designed to be used with CSF's B58 Super Manifold (CSF #8200 - ES4389640 or #8200B - ES4619750)

CSF is continually updating and adding new products In an effort to help customers achieve the highest level of competition in motorsports. CSF is pleased to release the latest B58 performance product. The CSF B58 Thermal Rejection Competition Spacer (CSF #8200S).

The CSF B58 Thermal Rejection Competition Spacer is the next level upgrade for the B58 Super Manifold (CSF #8200 - ES4389640 or #8200B - ES4619750). 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.

  • Made from KIYLEX® – A patented revolutionary high-performance final stage polymer
  • Spacer Height = 6.5mm
  • Acts as a thermal barrier that dissipates heat between the cylinder head and intake manifold
  • Proven to lower intake manifold temperatures by up to 15%
  • Lowers Intake Air Temps (IATs)
  • Can withstand temps up to 1100°F and is as strong as Aluminum
  • Self-Sealing and do NOT require gaskets, silicon products, or sealing agents of any kind.
  • Tested on @peppa_aka_skull’s (1000HP) A90 Supra by Visconti Tuning
  • Includes installation hardware and instructions
  • Highly recommended for Drag/Roll-Racing Applications where vehicles typically sit in staging lanes in-between racing
  • Limited Lifetime Warranty
  • Will NOT work with the OEM Manifold

The addition of the Thermal Rejection Spacer is especially useful for Drag/Roll-Racing Events where vehicles typically sit in staging lanes in-between racing. This causes extreme heat soak to the liquid-to-air manifold as there is not sufficient airflow passing over the front mount heat exchanger when the car is idling (which is responsible for cooling the charge air fluid that runs through the manifold). This causes the starting IATs on subsequent runs to be higher than on the initial run.

The B58 Super Manifold is made from Billet Aluminum and 100% Tig Welded for strength, which allows it to be able to withstand higher boost pressures compared to the OEM plastic manifold. Aluminum has higher thermal conductivity than plastic resulting in a higher rate of heat transfer between the cylinder head and manifold. Adding the Thermal Rejection Spacer reduces heat transfer between the two metal components (cylinder head & manifold). The spacer absorbs the heat from the cylinder head and dissipates it rather than transferring it to the manifold.

The CSF Thermal Rejection Competition Spacer was designed for vehicles competing in motorsports who demand the absolute best cooling in order to gain a competitive edge. With that being said, there are significant advantages to adding this spacer upgrade to any vehicle with the CSF B58 Super Manifold installed.

Not for sale or use in the state of California on any pollution-controlled vehicle as per the California Air Resources Board.

This Part Fits the Following Vehicles

Make Model Submodel Engine Special Fitment Notes
BMW A90 MKV Supra B58 3.0L Use vehicle selector to confirm fitment
BMW G01 X3 M40i B58 3.0L Use vehicle selector to confirm fitment
BMW G02 X4 M40i B58 3.0L Use vehicle selector to confirm fitment
BMW G05 X5 sDrive40i B58 3.0L Use vehicle selector to confirm fitment
BMW G05 X5 xDrive40i B58 3.0L Use vehicle selector to confirm fitment
BMW G05 X5 xDrive45e B58 3.0L Use vehicle selector to confirm fitment
BMW G06 X6 sDrive40i B58 3.0L Use vehicle selector to confirm fitment
BMW G06 X6 xDrive40i B58 3.0L Use vehicle selector to confirm fitment
BMW G07 X7 xDrive40i B58 3.0L Use vehicle selector to confirm fitment
BMW G11 740i B58 3.0L Use vehicle selector to confirm fitment
BMW G11 740i xDrive B58 3.0L Use vehicle selector to confirm fitment
BMW G11 745e xDrive B58 3.0L Use vehicle selector to confirm fitment
BMW G14 840i B58 3.0L Use vehicle selector to confirm fitment
BMW G14 840i xDrive B58 3.0L Use vehicle selector to confirm fitment
BMW G15 840i B58 3.0L Use vehicle selector to confirm fitment
BMW G15 840i xDrive B58 3.0L Use vehicle selector to confirm fitment
BMW G16 840i B58 3.0L Use vehicle selector to confirm fitment
BMW G16 840i xDrive B58 3.0L Use vehicle selector to confirm fitment
BMW G20 M340i B58 3.0L Use vehicle selector to confirm fitment
BMW G20 M340i xDrive B58 3.0L Use vehicle selector to confirm fitment
BMW G22 M440i B58 3.0L Use vehicle selector to confirm fitment
BMW G22 M440i xDrive B58 3.0L Use vehicle selector to confirm fitment
BMW G23 M440i B58 3.0L Use vehicle selector to confirm fitment
BMW G23 M440i xDrive Convertible B58 3.0L Use vehicle selector to confirm fitment
BMW G29 Z4 sDrive M40i B58 3.0L Use vehicle selector to confirm fitment
BMW G30 540i B58 3.0L Use vehicle selector to confirm fitment
BMW G30 540i xDrive B58 3.0L Use vehicle selector to confirm fitment
BMW G32 640i xDrive B58 3.0L Use vehicle selector to confirm fitment
*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.

This Product Is Covered By Our Lifetime Replacement Program

Products protected by our Lifetime Replacement Program are covered for as long as you own the product, no need to worry about an expiration date. Purchase your products and enjoy some worry-free motoring, knowing we've got you covered.

If you have any questions, would like to learn more or are ready to place a replacement claim, click here!

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Return and Exchanges

Need to set up a return? Click here to begin: Return Process

All you need is your order number and email address.


New/Unused Product Returns

ECS Tuning will accept returns for unused products within 90 days of the ship date for a refund to the original payment method used. The customer is responsible for the return shipping costs and fees. If selecting to use a prepaid shipping label, the shipping cost will be deducted from the total refunded amount. All new/unused products must be new, unused and must be in the original packaging, including labeling, manuals, hardware, etc. Special order parts are non-refundable.

In the event that we find an error on our website or on behalf of an ECS Tuning Representative, we will provide a return shipping label from the original delivery location.

Refused Packages

Any domestic orders that are returned to ECS Tuning as refused by receiver or non-deliverable will be subject to a return handling fee and will be processed as a return in compliance with our standard return policy, including a 15% restocking fee.

Any international orders that are refused at the time of delivery will be subject to carrier abandonment of the package, at which time the ordered products would be discarded by the carrier. The customer will not be refunded for the value of the order and the discarded products are no longer retrievable.

Return Process

Return Process

ECS Tuning now offers an online returns solution! To get started, simply log into your ECS Tuning account, Click the "View Orders" button on the My Account home page and select the order that you wish to make a return on to begin. If you have any questions, feel free to reach out to our Customer Service Team for assistance!

Please note: Refunds will be processed to the original payment method used on the order or to an in store credit, respective to the type of return that is made as well as any pre-existing arrangements with an ECS Tuning Customer Service Representative. In the event that multiple forms of payment were used, we will refund the value to an in store credit. In the event that a return label is provided, these charges may be deducted from the total refund you receive.

Original shipping costs are non-refundable and the buyer is responsible for return shipping charges. ECS Tuning will not accept COD deliveries.


All in store credit balances will expire after one year from the original purchase date.

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Shipping Policy

Free Shipping On Orders $49 & Up

Items marked with a 'Free Shipping On Orders $49 and Up' logo may qualify for free standard economy ground shipping to the contiguous United States (48 states) for most orders with a value greater or equal to $49.00 USD. Oversized products and direct ship products are excluded from this offer unless otherwise noted.

Free Shipping

Items marked as 'Free Shipping' may qualify for free standard economy ground shipping to the contiguous United States (48 states). Oversized products and direct ship products are excluded from this offer unless otherwise noted.


The policies listed above are subject to change at any time without notice.

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Lifetime Replacement

Want to know more about our Lifetime Replacement program?

Click here to learn more.

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Why You Should Shop From ECS Tuning

ECS Tuning stands out as more than an automotive parts supplier-it's a vibrant community fueled by a shared passion for cars. Born from the enthusiasm of car lovers, we offer an unmatched understanding and commitment to the automotive world, providing high-quality parts and accessories sourced from our own experiences. Our selection is meticulously crafted to meet the highest standards of performance, quality, and design, catering to both the latest trends and classic styles.


Our distinct advantage lies in our passionate team and comprehensive support, offering expert advice and seamless service from selection to installation. Shopping with ECS brings exclusive perks, including our Lifetime Replacement Guarantee and free shipping on orders over $49, enhancing the value of every purchase. As a central hub for car enthusiasts, ECS Tuning fosters a rich community where ideas and experiences flourish, transforming us from a mere supplier into a platform where automotive dreams come to life.

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Cancellation Policy

At ECS Tuning, we understand that plans can change. That's why we offer a flexible cancellation policy for our customers. You may cancel your order at any time before you receive the shipment confirmation. This policy is designed to provide you with peace of mind and the flexibility to make adjustments to your purchases as needed. Should you decide to cancel your order, simply reach out to our customer service team, and we will assist you with the process swiftly and efficiently.

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