Hi Shannen, Regarding the TPI engine head casting numbers, I believe the numbers are at home. I will dig around and get back to you. Best Regards, Bruce Bruce E. Wilcox Sr. Staff Engineer Ericsson Inc. Bruce.Wilcox at ericsson.com wilcox at rtp.ericsson.se 919-472-7054 (phone) 919-472-1103 (fax)