Part# ST2004 - Yella Terra Street Terra stud mount roller rocker set to suit Ford 221, 289, 302 & 351 Windsor V8 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. 3/8 UNC Stud mount with a rocker arm ratio of 1.6 : 1 [studs not included]

NOTE: Standard heads require machining for screw in studs ~ remove .320” from Rocker pads, drill and tap 3/8” UNC, then fit studs and guide plates, sold separately.
 

These Ford windsor Roller Rocker Arms suit the following cast iron and Alloy heads; Factory iron heads, AFR Alloy, Edelbrock Performer series 6027 - 6031, Edelbrock Performer RPM series heads 6021 - 6026, Victor Junior Jnr series 7716 - 7719, Dart Windsor Jr iron & alloy heads, Ford Motorsport J302 & K302, Rousch 200 30mm PEDS.