BMW makes their cylinder heads from aluminum. While this is beneficial for many reason, they do not react well to overheating. Especially prevalent on older BMW engines, and over-temp situation has been known to cause the head to warp. Turner Motorsport carries Genuine BMW replacement heads and parts to make your next rebuild a success.
Genuine BMW Flange Nut - M7 This item fits the following BMW Chassis: E70 X5M,E71 X6M,E36,E39,E46,E53 X5,E63,E65,E70 X5 X5,E71 X6,E83 X3,E85 Z4,E90,F01,F02,F10,F12,F13
Fits BMW Engines including: M42,M44,M52,M54,M56,M57,N63,S63,N62N