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Heating and Cooling› Oil and Fluid Coolers

CSF G-Series

68mm 2-Row Radiator with B-Tube Technology

$749.00 $695.00 Save $54.00

SKU: 8131

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The CSF 8131 is a high-performance heat exchanger designed for BMW B58 engines. This unit features a 2-row, 68mm core with CSF's B-tube technology for increased cooling efficiency. It is constructed from 100% TIG-welded aluminum and includes a detachable rock guard. The heat exchanger is a direct, plug-and-play installation requiring no modifications.

This heat exchanger offers significantly more cooling capacity than the OEM unit, helping to keep intake air temperatures stable and prevent heat soak, especially in high-performance tuning or upgraded turbo applications. It is available in a polished finish (CSF #8131).
Show original supplier description
The CSF G-Series 8131 is a high-performance radiator engineered to significantly improve your vehicle's cooling system efficiency. It utilizes a robust 68mm 2-row core, featuring CSF's advanced B-Tube Technology, which is noted as the world's largest 2-row core of its kind. This design, combined with 6.5mm multi-louvered fins, enhances both air and water flow, leading to superior heat dissipation. Beyond its internal engineering, the CSF 8131 radiator boasts a meticulous 1-hour "Mirror Finish" hand polish, adding a touch of aesthetic quality to its performance capabilities. CSF has also upgraded the inlet and outlet designs to further optimize system performance. This radiator is designed as a direct replacement, aiming to restore and surpass the original cooling system's operation.
Vehicle Symptoms
  • Noticeable power loss on hot track days
  • High intake air temperatures logged
  • Engine feels sluggish after repeated hard pulls
  • Heat soak during spirited driving
  • Inconsistent performance in warm weather
Relevant Conversations
  • CSF 8131 B58 heat exchanger review
  • B58 intercooler upgrade forum
  • Reduce IAT on BMW B58
  • CSF vs Wagner intercooler B58
  • BMW B58 charge air cooler upgrade
  • CSF 8131 install B58
  • B58 heat soak fix track day
  • B58 power loss hot weather
  • Best heat exchanger for B58 engine
  • CSF B58 heat exchanger vs OEM

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandCSF G-Series
Part Number8131
CategoryHeating and Cooling
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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