Part# YT5021 - Yella Terra Platinum extreme duty racing roller rockers, twin shaft type roller set to suit Ford late 5.0 & 5.8 litre Windsor V8 EFI engines or carburettor 289, 302, 351 engines with after market heads [see below]. The extreme race series of rollers is the latest design, extruded 2024 aluminium [aluminum for our USA friends] rocker arms, wide body roller rockers for extreme race applications. For use with mechanical or hydraulic camshafts. Includes shafts and 7/16 UNC mounting fixtures, adjustable valve lash on tail of rocker arm [push rod side] with a rocker arm ratio of 1.65 : 1

These Ford windsor Roller Rocker Arms suit aftermarket iron and Alloy heads of the following brands. Dart Windsor Jr Iron & Alloy, Ford Motorsport J302 & K302, Rousch 200 30mm PEDS.