Looks like they're these, based on some other posts I've found online. 351C 2V 1/16-1/16-1/8 10.2:1 TRW Forged L2348F*8 http://www.flatlanderracing.com/trwfordsb.html Try calling TRW directly to verify. http://www.trw.com/sub_system/ec_contact_info