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CSF High-Performance Auxiliary Radiator - BMW G8X 2021-2026

CSF SKU: CSF8321
Price
7% OFF
In Stock – Ready to Ship
Make sure this fits your vehicle Select your vehicle to confirm fitment before you order. Check
Shipping calculated at checkout.

CSF's high-performance auxiliary radiator replaces the OEM unit's plastic tanks with 100% aluminum TIG-welded tanks and upgrades the core to 2-row 42mm (versus 1-row 34mm OEM) using CSF's exclusive B-Tube technology. Track-spec 5mm multi-louvered fins maximize heat dissipation while maintaining airflow. The multi-fit design installs on either the left side (engine cooling) or right side (charge air cooling) with OEM-style quick-connect fittings, includes a detachable rock guard, and is individually leak and pressure tested. Sold individually; every application uses two.

Specifications

Type Auxiliary radiator
Position Left or right (multi-fit)
Core 2-row, 42mm, CSF B-Tube technology (OEM 1-row 34mm)
Fins 5mm multi-louvered
Material 100% aluminum, TIG-welded tanks
Finish Satin black
Rock Guard Detachable, included
Connections OEM-style quick connect
OEM Replacement 17 11 8 095 285
Quantity 1 (sold individually; two used per vehicle)
Part Number 8321
Warranty 2-year limited (CSF)

This part fits:

Year Make Model Submodel
2024-2026 BMW M3 Competition xDrive
2024 BMW M3 CS
2021-2026 BMW M4 Base
2021-2026 BMW M4 Competition
2022-2026 BMW M4 Competition xDrive
2025 BMW M4 CS
2023 BMW M4 CSL

Shipping

  • Orders placed before 3 PM EST typically ship the same business day. Larger items ship within 1 to 3 business days.
  • Standard, expedited, and overnight options at checkout.
  • Oversized items ship by freight and take longer.
  • Special order items follow a lead time we confirm with you individually before the order is committed.
  • Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
  • Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
  • International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

  • 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
  • Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
  • Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
  • Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
  • Product images may be representative. The SKU and specifications in the listing are what ships.
  • Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Returns & Refunds · Warranty
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