CSF BMW M5 G90/G99 High-Performance Charge Air Coolers

One of the biggest limiting factors on the S68's power potential is the fragile factory charge-air coolers - a known weak point that quickly becomes a bottleneck once the engine is tuned. The S68 has already demonstrated over 900whp on stock internals, and CSF drew directly on the proven success of its S63 coolers (over 500 kits sold, many on 1000+hp builds across the F9X M5/M8 and X5M/X6M) to revise the design specifically for the new G90/G99 M5.

The new cores are ~100% larger in volume than the factory units, engineered through CFD analysis and real-world testing for optimal performance and perfect fitment. TIG-welded cast aluminium end tanks replace the OEM's weak crimped plastic tanks, and an integrated cast aluminium charge pipe eliminates the factory's glued-on plastic charge pipe - a genuine durability upgrade, not just a cooling one. Independent testing showed a stock G90 M5 producing 696whp/729wtq baseline: after fitting CSF's coolers alongside an intake, exhaust, and tune, the same car delivered 757whp and 828wtq - even in 100°F heat and high humidity, a gain of nearly +61hp and +100lb-ft.

Why Choose These Charge Air Coolers

• ~100% larger core volume - CFD-optimised for maximum heat rejection over the factory units
• TIG-welded cast aluminium end tanks - replaces the OEM's weak crimped plastic tank design
• Integrated cast aluminium charge pipe - eliminates the factory's glued-on plastic charge pipe
• Dual E85/methanol injection ports built in - genuine headroom for future power upgrades
• OEM-style quick-connect water connections - true drop-in fit, no modification required

Compatibility

• BMW G90 M5 Sedan (2025+, S68)
• BMW G99 M5 Touring (2025+, S68)

Finish Options

• OEM+ crinkle black (standard)
• Custom finishes available at additional cost