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Mishimoto G8X M3 M4 Auxiliary Radiators 2021-2027 product view

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Mishimoto MMRAD-G80-21A installed angle on vehicle

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Mishimoto G8X M3 M4 Auxiliary Radiators 2021-2027 core and end tank detail

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Mishimoto G8X M3 M4 Auxiliary Radiators 2021-2027 packaging and included hardware

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Mishimoto 2021-2027 application close-up of MMRAD-G80-21A

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Mishimoto G8X M3 M4 Auxiliary Radiators 2021-2027 mounting points detail

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Mishimoto G8X M3 M4 Auxiliary Radiators 2021-2027 finish and construction detail

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Mishimoto G8X M3 M4 Auxiliary Radiators 2021-2027 inlet and outlet close-up

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Mishimoto G8X M3 M4 Auxiliary Radiators 2021-2027

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Brand: MishimotoSKU / Part #: MISMMRAD-G80-21A

Regular price: $587.95
Regular price: ~~$647.00~~
Sale price: $587.95
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Subtotal: $587.95

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Mishimoto G8X M3 M4 Auxiliary Radiators 2021-2027

Subtotal: $587.95

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Overview

2021-2027 BMW G8X M2/M3/M4 cars run dual auxiliary radiators that limit heat rejection once you add track time or a tune. This Mishimoto performance auxiliary radiator pair replaces both sides with larger TIG-welded aluminum cores.

Paired aux rads for S58 heat

About 25 percent more core volume, strutted tubes and full-aluminum tanks improve durability and heat transfer. Stone guards are sold separately. Direct fit for G80/G82/G87 applications in the table. AutoTalent lists this Mishimoto performance aluminum radiator with verified US-market fitment for the vehicles in the table below. Installation is a direct-fit job for the listed chassis when you follow Mishimoto's application guide. Keep factory coolers, sensors and fasteners in good condition when the instructions call for reuse, and torque every clamp and fastener to the published spec. If you are stacking supporting mods—intake, tune, larger turbo or track-day heat—confirm hose routing and cooler clearance before the first hard pull. US shipping dimensions and weight above are for the boxed kit so you can plan freight.

Features

Direct fit for 2021+ BMW G8X M2/M3/M4
25-percent increase in core volume for improved heat transfer
Aluminum, TIG-welded end tanks for maximum durability
Strutted tubes provide further reinforcement against vibration and impacts
Increased fluid capacity for maximum cooling capability
Mishimoto Lifetime Warranty

What's Included

(2) Auxiliary Radiators
(2) Auxiliary Radiators
Mishimoto Lifetime Warranty

Specifications

Part number	MMRAD-G80-21A
Brand	Mishimoto
Type	Performance aluminum radiator
Engine codes	S58B30
Chassis codes	G80
Shipping dimensions	15.1 x 14.6 x 13.1 in (38.4 x 37.1 x 33.3 cm)
Shipping weight	13.7 lb (6.2 kg)

Fitment Notes

Verified against Mishimoto's US application data for 2021-2027 (7 rows). Years extended to 2027 where the US model remains in production.

Vehicle Fitment

Questions about fitment? Call (310) 231-0292 or text (310) 886-3111.
Year	Make	Model	Chassis	Engine
2023-2027	BMW	M2	G87	3.0L Twin-Turbo I6 (S58)
2021-2027	BMW	M3	G80	3.0L Twin-Turbo I6 (S58)
2024-2027	BMW	M3 CS	G80	3.0L Twin-Turbo I6 (S58)
2021-2027	BMW	M3 Competition	G80	3.0L Twin-Turbo I6 (S58)
2022-2027	BMW	M4	G82	3.0L Twin-Turbo I6 (S58)
2023	BMW	M4 CSL	G82	3.0L Twin-Turbo I6 (S58)
2022-2027	BMW	M4 Competition	G82	3.0L Twin-Turbo I6 (S58)

Fitment

Year	Make	Model

Not sure? Text us your VIN and we’ll confirm.

Shipping & returns

Shipping: Orders ship via UPS, FedEx or USPS, from our facility near Los Angeles or directly from the manufacturer. Rates for many items are weight-based and shown at checkout. If you need it by a certain date, text us before you order.

Returns: Unused items in brand-new condition and original packaging can be returned within 30 days of the invoice date, with a 25% restocking fee unless otherwise specified. In some cases we can offer a lower fee with the balance as store credit. Shipping charges aren't refundable in either direction unless approved by AutoTalent.

Not returnable: special-order or custom items, and anything that has been installed, modified or altered.

Cancellations: free if the item is out of stock or we miss the ETA you agreed to. Other cancellations carry a 5% processing fee to cover card fees we can't recover. Special-order items can't be cancelled.

Damaged in transit? Report it to the carrier and to us within 48 hours, keep all packaging, and don't send anything back without our written approval.

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