Specificities：
1、This aluminum cooler accessory has been designed and manufactured to suit OEM（11537541992, 11537544638） applications with precise tolerances and significantly improved functionality.
2、The coolant flow path through the center of the joint is optimized to maximize the cooling flow.
3、There is no sharp angle on the joint, so the cooler will not be interrupted when passing through.
4、The parts can be replaced directly without modifying any part of the system.
5、Made of high quality aluminum alloy materials for durability.
Compatible Vehicles
For N54 3.0L twin-turbo motors 335i, 335xi, 135i.
For N53 (3.0L non-turbo) 2006 - 2010 325i, 330i, 525i, 525xi, 528i, 528xi, 530i, 530xi.
For N52 X3
For N20 (2.0L turbo) Z4 2013 & up
This fitting also compatible with next generation N55 motors in all chassis.