Fit For 635d E63 E64 525d 530d 535d E60 E61 AP03 Tuning Performance Intercooler. By significantly lowering the temperature of air compressed by the turbocharger, the intercooler increases its density, allowing more oxygen to enter the cylinders for combustion. The presence of an intercooler effectively prevents engine knocking or detonation, which safeguards critical internal components from potential damage under high boost. Its optimized fin and tube structure cuts inlet air temperature efficiently, preventing engine knock and ensuring stable combustion. The durable anti-pressure aluminum alloy shell resists thermal deformation, maintaining consistent heat exchange performance under long-term high loads., Manufacturer: KASDPMNB