Part# ST2047 - Yella Terra Street Terra shaft type roller rocker set to suit Ford late 5.0 & 5.8 litre Windsor V8 EFI engines. Economically priced, entry level rollers that have a strong vacuum die formed light weight arm designed for high performance street and budget race applications that do not have excessively high valve spring pressures. For use with hydraulic camshafts. Direct bolt on replacement roller rockers, no machining on head required; 5/16 bolt on shaft type rollers, adjustable valve lash on tail of rocker arm [push rod side], with a rocker arm ratio of 1.6 : 1

These Ford windsor Roller Rocker Arms suit the Factory iron EFI heads on engines originally fitted with Electronic Fuel Injection.