Whenever pushing your car past the factory-designated limits of operation, whether it be through hard driving or performance modifications, adequate engine cooling should always be a high concern.
In fact, improving performance by increasing engine work is only possible when engine temperatures are kept within a reasonable range.
The Mishimoto Performance Radiator is capable of a 35% increase in cooling capacity due to a fully-brazed, two-row aluminum core that's 25% thicker than stock. The direct-fit radiator also uses CNC-machined quick-disconnect fittings for perfect fitment.
Click HERE for your E82/E88 135i Mishimoto Performance Radiator