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Mishimoto Performance Auxiliary Radiator - BMW M2 2019-2021 / M3 & M4 (F8x) 2015-2020
Mishimoto Performance Auxiliary Radiator - BMW M2 2019-2021 / M3 & M4 (F8x) 2015-2020
Mishimoto Performance Auxiliary Radiator - BMW M2 2019-2021 / M3 & M4 (F8x) 2015-2020
Mishimoto Performance Auxiliary Radiator - BMW M2 2019-2021 / M3 & M4 (F8x) 2015-2020
Mishimoto Performance Auxiliary Radiator - BMW M2 2019-2021 / M3 & M4 (F8x) 2015-2020
Mishimoto Performance Auxiliary Radiator - BMW M2 2019-2021 / M3 & M4 (F8x) 2015-2020
Mishimoto Performance Auxiliary Radiator - BMW M2 2019-2021 / M3 & M4 (F8x) 2015-2020
Mishimoto Performance Auxiliary Radiator - BMW M2 2019-2021 / M3 & M4 (F8x) 2015-2020
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Mishimoto Performance Auxiliary Radiator - BMW M2 2019-2021 / M3 & M4 (F8x) 2015-2020

$494.00 $448.95
Mishimoto
MISMMRAD-F80-15A
Out of stock Many in stock
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Mishimoto Performance Auxiliary Radiator - BMW M2 2019-2021 / M3 & M4 (F8x) 2015-2020

Key Benefits

  • Built for back-to-back track sessions - the upgraded auxiliary radiator adds the cooling capacity the S55 needs to hold temperatures through sustained high-load driving, where the factory unit heat-soaks and gives up margin.
  • 32% more external tube area for greater heat rejection - paired with a 9% larger core volume, the expanded core moves more heat into the airstream than the stock auxiliary radiator.
  • Mounts on either side of the car - a robust bracket design fits both the driver- and passenger-side auxiliary radiator locations, so a single part covers either position.
  • No plastic tanks to crack - aluminum, TIG-welded end tanks replace the factory components that fail under repeated heat cycling and high-output use.
  • Strutted tubes resist vibration and impact - internal tube reinforcement strengthens the core against the road vibration and debris strikes that fatigue a low-mounted radiator over time.
  • Removable stone guard shields the core - protects the exposed face from road debris thrown up at the front of the car.
  • Confirmed direct fit for the 2015-2020 BMW F8X M3 and M4 - installs in the factory auxiliary radiator location with no cutting, fabricating, or adapter work required.
  • Own it for life - backed by Mishimoto’s Lifetime Warranty, your investment is protected long after install day.
The 2015-2020 BMW F8X M3 and M4 rely on auxiliary radiators mounted low in the front corners of the car to keep the S55 in its operating window. Under sustained track use and aggressive street driving, the factory units run out of cooling capacity and heat-soak between runs - and their low position leaves them exposed to road debris and the plastic end tanks prone to cracking under repeated heat cycling. The Mishimoto Performance Auxiliary Radiator replaces the stock unit with a larger, fully reinforced aluminum core engineered to add thermal headroom and survive the conditions that retire the OEM part early.

The core carries 9% more volume and 32% more external tube area than stock, rejecting more heat into the airstream when the engine is working hardest. Strutted tubes reinforce the core against the vibration and impacts that fatigue a low-mounted radiator, while removable stone guard shields the exposed face from debris. Aluminum, TIG-welded end tanks replace the failure-prone factory components, and a robust bracket design fits both the driver and passenger-side locations from a single part.

Direct fit for the 2015-2020 BMW F8X M3 and M4 - installs in the factory auxiliary radiator location with no cutting, fabricating, or adapter work required. Backed by the Mishimoto Lifetime Warranty.


Tech Specs:

More Information
Overall Length (in) 10.4
Overall Height (in) 9.9
Overall Width (in) 3.3
Core Length (in) 10.1
Core Height (in) 6.9
Core Thickness (in) 1.6
Rows 1
Drain Plug Thread Size M12 - 1.5
Material Aluminum
Engine Codes S55B30
Chassis Codes F80
F82
F83

 

Purchase Includes: 

(1) Auxiliary Radiator
(1) Powder Coated Steel Stone Guard
(2) Powder Coated Steel Mounting Brackets
(3) O-Rings
(8) M6 Lock Washers
(8) M6 Button Head Bolts

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Due to the recent suspension of the De Minimis Tariff Policy, there may be tariffs applicable to your order if the item ships from outside of the United States. Any tariffs / import duties are strictly the responsibility of the consumer. Returns Policy

Returns may be accepted within 14 days of purchase pending Return Merchandise Authorization (RMA). No returns or cancellations on special order items. All returns will be charged a 20% restocking fee, no exceptions.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging. Item must be able to be resold as new. Several types of goods are exempt from being returned. Hazardous materials, fluids, greases, chemicals, and clothing are not able to return.

Free shipping is available within the lower 48 states for most orders totaling $199 or more. A free shipping option will be available during checkout. This offer is for delivery address in the continental United States and excludes shipments going to Alaska, Hawaii, Military Boxes, and items that require freight shipping.

Processing Time
Patterson Performance stocks a large quantity of items at any given time. Some items may require drop shipping from one of our various distributors. In stock items will ship within 1-2 business days. If you're needing your product quickly, please contact us to verify product availability before placing your order. Orders requiring additional verification (security concerns, incorrect information, etc.) may need additional processing time. Estimated shipping dates are not guaranteed and are subject to change based on inventory levels and manufacturer lead times. Backordered items are shipped immediately once available.

Items ship daily, If the item you ordered is not in stock, a member of our team will contact you via email / phone.

Patterson Performance will only ship to an address that varies from your billing address if payment is made via Paypal or a financing partner.

Patterson Performance ships from multiple warehouses throughout the United States, and sometimes from manufacturers overseas.

You can simply contact us via email / telephone for a live inventory check

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