Trying to order some ARP head studs and they're asking me questions that I can't answer. Heads are at the machine shop. How many of each size will it need? These heads are 243 castings off of an '06 LS2 powered vette. Engine is an LQ4 out of an '04 2500HD. If anyone has the ARP part number, I'd appreciate it. Summit and Jegs catalogs and web sites haven't helped. TIA.

 

Look at the head bolts that came out of your motor. If they are all the same length you need the 04 and up style bolts/studs. If there are 2 short and the rest long, you need the 03 and down kit. Dont just go by the year though both my motors came from 04 trucks and have the 03 style bolts!