Part# YT5004 - Yella Terra racing roller rockers, stud mount roller set to suit Ford 221, 289, 302 & 351 Windsor V8 engines. The ultimate race set up, proven over many years is this race series roller rocker when installed along with screw in studs and push rod guide plates to give you full valve lash adjustment and minimal reciprocating weight in the strongest rocker arms available. 3/8 UNC Stud mount with a rocker arm ratio of 1.6 : 1 ~ For use with mechanical or hydraulic camshafts.

For added valve train strength an additional stud girdle can be installed, sold separately. Your heads may require machining for screw in studs and guide plates. Screw in studs and guide plates sold separately; note hardened push rods have to be installed when using guide plates.

NOTE: Standard heads that 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, TFS Twisted Wedge heads.