Ross flat top forged piston set for use in 440 "RB" engine block 4.350" bore size. This is .030" over standard size. For use with stroker crank with stroke of 4.150" and stock rod length of 6.768" nominal 10.7-1 compression with 86cc chamber head. Uses .990" diameter piston pin. Piston weight is 607 grams. Compression height is 1.865"
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