Billet Aluminum Coolant Port Fitting Upgrade for BMW

Metal Coolant Port Fitting Upgrade for BMW! This heavy-duty billet aluminum fitting is a metal direct replacement for the weak plastic factory coolant fitting which is prone to cracking and failure over time especially during disassembly. It's only a matter of time until it fails. The factory plastic part heats and cools thousands of times and eventually becomes brittle and will crack and fail. Just a matter of time. 100% needed upgrade. Vehicle Fitment• N54 3.0L twin-turbo motors 135i, 335i, 335ix, and 1M• N52/N53 (3.0L non-turbo motors) • 2006 - 2010 325i, 330i, 525i, 525ix, 528i, 528ix, 530i, 530ix / N52 X3 / N20 (2.0L turbo) Z4 2013 & up Replaces OEM part numbers 11537649409, 11537605152, 11537603514, 11537598234, 11537592095, 11537591889, 11537585023, 11537584549, 11537581063, 11537580969, 11537578727, 11537566329, 11537560363, 11537552339, 11537550062, 11537545890, 11537541992 What's included(1) Billet Aluminum Coolant Port Flange Fitting(1) Heavy-duty o-ring(1) Stainl