These Eagle H-beam connecting rods compatible with the 90-05 Miata both 1.8 and 1.6L engines.  They are forged from SAE 4340 steel for superior strength. ARP bolts (2000, 8740 or L19 Series) and alignment sleeves are used for durability and precise cap location. Sets are weight matched to +/- 1g. Sizing is performed on the unique Sunnen Krossgrinding system for a perfect housing bore. These are the perfect choice for engines up to 750 hp.