MMX Performance MINI F-Chassis Performance Intercooler

The MMX Performance intercooler is a substantial cooling upgrade for F-Series MINIs running the Cooper S or Cooper S JCW powertrains. The factory intercooler is one of the first thermal limits a tuned B46/B48 MINI hits, once charge-air temps climb, timing pulls and power drops on every successive run. This intercooler resolves that.

The tube-and-fin stepped core delivers nearly double the core volume of the OE unit, with a 70% increase in frontal area. That extra cooling capacity translates to substantially lower charge-air temperatures both at sustained throttle and on back-to-back pulls, the kind of conditions where the OE cooler thermally saturates first.

The real-world impact is heat-soak resistance. On a stock car you preserve consistent power across multiple runs; on a tuned car you unlock the headroom to actually use the boost the tune is requesting, without timing pull masking the gains. It is the foundational piece for any meaningful F-MINI tune.

Choose the variant that matches your car at checkout, the Cooper S and Cooper S JCW each get a dedicated SKU. Chargepipes are available separately and are a strongly recommended companion when running elevated boost.

Product Details

• Tube-and-fin stepped core construction
• Approximately 2× OE core volume
• 70% increase in frontal area versus OE
• Substantially reduces charge-air temperatures
• Vehicle-specific variant: Cooper S or Cooper S JCW
• SKU MMR05-1402 (Cooper S), MMR05-1401 (Cooper S JCW)

Notes

• B46 and B48 engines only. Does NOT fit cars with the B48D engine code.
• Pre-LCI F56 only: does NOT fit LCI models.
• Does NOT fit MINI F57 Convertible.
• Includes a 1-year manufacturer warranty against defects in materials and workmanship
• Designed and tested in the United Kingdom
• View emissions compliance notice