Clevite GM Pass & Trk 112 121 122 134 140 153 194 230 250 265 283 302 Con Rod Bearing SetClevite H Series performance bearings have a medium level of eccentricity, high crush, and a hardened steel back and thin overlay. These bearings are made without flash plating for better seating. Use H Series bearings with crankshafts that have oversize fillets and where engines run in the medium to high RPM range. This Part Fits: Year Make Model Submodel 1973 1975 Buick Apollo Base 1975 Buick Apollo SR 1993 1994 Buick Century Custom 1993,1996 Buick