CB663HN Connecting Rod Bearing With Small Block Chevy Engines

These bearings were developed primarily for use in NASCAR type racing but are suitable for all types of competition engines. H series bearings have a medium level of eccentricity high crush and rod bearings have a hardened steel back and thin overlay. These bearings also have enlarged chamfers for greater crankshaft fillet clearance and are made without flash plating for better seating. Bearings with 0.001 in. extra clearance are for standard size shafts and carry the suffix HX" (X = extra clearance). Rod bearings are with or without dowel holes (HD = with H = without) main bearings are with standard 180 Degree upper half grooving and with full 360 Degree grooving (H = 180 Degree HG 360 Degree). Use H series bearings with crankshafts that have oversize fillets and where engines run in the medium to high RPM range. H series bearings should be used if contact patterns obtained with P series parts are too narrow. Contact patterns should ideally cover 2 3 to 3 4 of the bearing surface. If you aren t sure which type of performance bearing to start with the H series bearing will be your best choice. Features Suitable For All Types Of Competition Engines Bearings Have A Medium Level Of Eccentricity Rod Bearings Have A Hardened Steel Back And Thin Overlay Also Have Enlarged Chamfers For Greater Crankshaft Fillet Clearance High Crush For Better Seating And Retention Bearings Can Be Used With Crankshafts That Have Oversize Fillets And Where Engines Run In The Medium To High RPM Range Compatibility - Chevy Small Block Engines Type - Standard Material - Steel Backed With Copper-Lead Alloy