do88 Auxiliary Radiators - BMW M340i (G20) / Toyota GR Supra 2017-2026 - Pair

do88 Auxiliary Radiators - BMW M340i (G20) / Toyota GR Supra 2017-2026 - Pair

do88 SKU: DOBWC-410
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The B58 Gen 2 cooling system runs one large central radiator plus a smaller auxiliary radiator in front of each front wheel, and the factory auxiliaries combine slim cores with plastic tanks that heat soak on a tuned engine. do88 replaces both sides with a dual row 40mm aluminium core and TIG welded end tanks, raising core volume and fluid capacity so coolant temperature stays in range on the street, on track and at the strip. Each radiator arrives with CNC machined mounting brackets and OE style quick connect inlet and outlet fittings, and the factory rock guard transfers straight across for stone protection.

Specifications

Type Auxiliary performance radiator, dual row aluminium core
Position Front left and front right, ahead of the wheels
Core 2 row, 40mm thick
Material Aluminium with TIG welded end tanks
Included 2 radiators, CNC machined mounting brackets, OE style quick connect fittings
Fitment Requirement BMW models must have the factory right side remote radiator 17118672237, fitted with M Technology Package option code 33T
Part Number WC-410
OEM Replacement 17118672237 (BMW), 16400-WAA04 (Toyota)
Quantity Pair (2 radiators)

Documents: Installation Instructions (PDF)

This part fits:

Year Make Model Submodel
2020-2026 Toyota GR Supra 3.0 B58
2022-2026 BMW M240i B58 (G42)
2022-2026 BMW M240i xDrive B58 (G42)
2018-2026 BMW M340i B58 (G20/G21)
2018-2026 BMW M340i xDrive B58 (G20/G21)
2021-2026 BMW M440i B58 (G22/G23/G26)
2021-2026 BMW M440i xDrive B58 (G22/G23/G26)
2017-2026 BMW Z4 M40i B58 (G29)

Shipping

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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.
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  • Product images may be representative. The SKU and specifications in the listing are what ships.
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Full details: Shipping Policy · Returns & Refunds · Warranty
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