The S63 4.4L Twin Turbo V8 in the BMW F1X M5/M6 is an absolute monster that responds incredibly well to bolt-on upgrades, larger turbos, and performance tuning. Tuners quickly found that increasing power on the S63 pushed charge air temperatures past the OEM Charge-Air-Coolers' limits resulting in dangerously high Intake Air Temperatures (IATs). Pure turbos approached CSF to develop a Charge-Air-Cooler upgrade that would hold up to the extreme boost levels their turbos upgrades could generate and keep the car's IATs in check. The result was the World's 1st Cast End Tank Designed High-Performance Charge-Air-Cooler Set for the F1X M5/M6. CSF used CFD analysis and testing to create the largest charge-air-cooler that could fit in the factory location. The Top/Bottom, Cross-Flow, Dual-Pass Cores are 28% larger than the factory coolers and offer significant reductions in IATs at increased boost levels.