BMW OEM Cylinder Head Bolt Set (Aluminum) for 525i 525xi 530i 530xi 528i 528xi 530xi X5 3.0si 128i X3 3.0i X3 3.0si Z4 3.0i Z4 3.0si Z4 3.0si 128i Z4 30i 323i 325i 325xi 328i 328xi 330i 330xi 323i 328i 328xi 325xi 328i 328xi 328i 328xi 328i 328xi 328i 328xi 328i 328i 528i X3 28iX BMW OEM Cylinder Head Bolt Set (Aluminum) Notes: 4 bolts per set. Also use- (Qty.) (1) 11 12 7 548 799 Cylinder Head Bolt Set. BMW Manufacturer Warranty: 12000 miles or 1 year Please see Product Description below for vehicle compatibility.