8 X BMW Genuine Cylinder Head Exhaust Port Stud Bolt 7 X 39 mm E39 E46 E53 E60 E 525i 528i 530i 320i 323Ci 323i 325Ci 325i 325xi 328Ci 328i 330Ci 330i 330xi X5 3.0i 525i 530i X3 2.5i X3 3.0i Z4 2.5i Z4 3.0i Z3 2.5 Z3 2.5i Z3 2.8 Z3 3.0i 8 X BMW Genuine Cylinder Head Exhaust Port Stud Bolt 7 X 39 mm E39 E46 E53 E60 E from 03/00 Cylinder Head -- Manufacturer Warranty: 24000 miles or 2 years Please see Product Description below for vehicle compatibility