BMW M3 Performance Auxiliary Radiator by Mishimoto (Aluminum), 2015–2020. A direct-fit upgrade engineered to add cooling headroom and durability for F8X track and aggressive street use.

Mounted low in the front corners, the factory aux radiators can heat-soak and take damage over time. Mishimoto replaces them with a larger, fully aluminum, TIG-welded unit that boosts thermal capacity and stands up to abuse. The core delivers 9% more volume and 32% more external tube area to reject more heat when the S55 is under sustained load. Strutted tubes reinforce the core, a removable stone guard shields against debris, and a single part fits either driver or passenger side with no cutting. Backed by the Mishimoto Lifetime Warranty. Part number MMRAD-F80-15A.

Features

• 9% larger core volume; 32% more external tube area
• TIG-welded aluminum end tanks; no plastic to crack
• Strutted tubes resist vibration and impacts
• Removable stone guard for debris protection
• Fits driver or passenger side; direct bolt-in
• Confirmed for 2015–2020 BMW F8X M3/M4; Lifetime Warranty

Have questions or planning a build? Call us—our specialists are ready to help. We offer installation and customization at our Austin, Texas and Los Angeles, California area locations. Texas: 512-982-9393. California: 562-981-6800.

If you’re considering multiple items, contact us for potential shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov