Fit for:for Opel CIH Ascona B 1584ccm;Bolts size:ARP 2000 3/8 bolts;Product name:Racing Rods, TUV Certification Con Rods;Key words:Forged, Performance Conrod;Weight Tolerance:Balanced to +/- 1 gram in set;HP Rating:600hp ~ 800hp per set;Center to center