You need the stud kit with the longer stud by the vtec solenoid...... Y bottom end w/ z6 head

http://WWW.GO-AUTOWORKS-STORE.COM/arphestkitd11.html

Or

http://www.ebay.com/itm/ARP-208-43X1...#ht_1285wt_689



Ignore the y7 only b/s