New Old Stock Engine Rebore Kit for Ford 800,  801,  811,  820,  821,  840,  841,  850,  851,  860,  861,  871,  881,  900,  901,  940,  941,  950,  951,  960,  961,  971,  981,  4031,  4110,  4120,  4121,  4131,  and 4140 Tractors.

Will also fit Ford 4000 Tractors with 4 cylinder engines.

Will ONLY fit tractors with 172 cubic inch Gas Engines.

This is a rebore kit for 0.040" thousandths overbored engine.

Standard bore is 3.9" inch bore.

The (2) compression rings are 3/32" inch thick for each piston.

The (1) oil ring is 3/16" inch thick for each piston.

Wrist pins and clips are included for each piston.

This engine rebore kit was produced by Gould Engine Parts Division.  These kits are new old stock from a dealership liquidation.  They were produced in the 1970's.

We would recommend careful inspection and cleaning the kits before installation due to age.

Ford New Holland and aftermarket engine rebore kit part numbers: RKA-1157-40,  RKA115740.

Please carefully verify your engine's piston bore diameter to ensure you order the correct kit.