Mishimoto Performance Auxiliary Radiator – BMW S55 M3 / M4 (F80 / F82 / F83)

OVERVIEW

The F80 M3 and F82 / F83 M4 rely on a pair of auxiliary radiators mounted low in the front corners of the car. Under sustained track use the factory units heat-soak, and their plastic end tanks become a liability as they age.

Mishimoto's performance auxiliary radiator adds 9% more core volume and 32% more external tube area, with TIG-welded aluminum end tanks and strutted tubes in place of the OE plastic. One bracket design fits either the driver-side or passenger-side location, and it is a direct fit with no cutting or adapters.

SPECS

• 9% more core volume and 32% more external tube area than stock
• TIG-welded aluminum end tanks
• Strutted tubes for vibration and impact resistance
• Removable stone guard
• Fits either the driver-side or passenger-side location
• Overall: 10.4 in L × 9.9 in H × 3.3 in W
• Core: 10.1 in L × 6.9 in H × 1.6 in thick, 1 row
• Drain plug thread: M12 × 1.5
• Weight: 11 lb
• Engine code: S55B30
• Chassis codes: F80, F82, F83
• Installation difficulty: easy
• Mishimoto Lifetime Warranty

PARTS INCLUDED

• (1) Auxiliary radiator
• (2) M6 studs
• Mishimoto Lifetime Warranty

TECH RESOURCES

Additional Parts Required

• None. Mishimoto specifies no additional hardware for this part.
• Coolant is not supplied. Have enough fresh BMW-spec coolant for a full fill and a proper bleed cycle.

Installation

• Mishimoto F8X Auxiliary Radiator – Installation Guide (PDF)

Notes

• Sold individually. The car has two auxiliary radiators; order two to replace both sides.
• Matching heat exchanger: Mishimoto Heat Exchanger – BMW S55 (F8x).
• Price is for the item selected only; labor is not included.

PART NUMBER

• MMRAD-F80-15A

VEHICLE APPLICATIONS