Description:

Aluminum coolant fitting is designed and manufactured to precise tolerances to fit the OEM application with notable improvements in function.

Machined from billet aluminum 6061 T6511 (not cast, not forged).

Designed to maximize the resistance to breakage, so that it will not fail as the OEM fitting does.

The coolant flow path through the center of the fitting is optimized to maximize coolant flow.

There are no sharp corners on this fitting so that the coolant will not be disrupted as it passes through.

Along this same line, the surface area of the coolant flow path is 23% larger than the OEM pieces which further optimizes coolant flow, improving cooling performance.

Specification:

OEM replacement :11537541992 and 11537544638.

Never wear-out, crack or leak.

Direct replacement, no modification.

How to install:

Simply remove the end of the hose from the plastic fitting and then the fitting from the head (hose does not need to be removed from the thermostat housing to do this). Then install the replacement aluminum fitting to the head and slide the hose and hose clamp over the fitting.

Fitment:

3.0L twin-turbo N54 (3.0-litre twin turbo) motors 335i, 335xi, 135i

N53 (3.0-litre non-turbo) 2006 - 2010 325i, 330i, 525i, 525xi, 528i, 528xi, 530i, 530xi

N20 (2.0-litre turbo) Z4 2013-,

N52 X3;

also fits the next generation N55 motors in all chassis.

Package Includes:

1 aluminum fitting

1 stainless steel hose clamp

（NOT include the hose）

Note:

*Professional Installation is Recommended*

Due to light and screen difference, the item's color may be slightly different from the pictures.

Please allow 1-5mm deviation due to manual measurement.

THANK YOU FOR SHOPPING WITH US!

Have a nice day！☺