When replacing an intake/exhaust gasket or replacing the manifold, always inspect the mounting studs for stripped, rusted, or wornout threads. Stretched threads means less pull on the manifold for better sealing and NO vacuum leaks between the intake manifold and the cylinder head. This kit replaces all studs and nuts on both the 113 and 125 engines.  If you need an intake gasket, our P/N is 1603-02 for the B,IB,C,CA & RC model Tractors.