(B18C1 DOHC VTEC - 81mm Bore, -3cc Dish, 10.0 Comp Ratio with Stock Head, Flat Top) Built for the Acura Integra... Arias Pistons has been the leader in compact piston technology since their beginnings. While piston suppliers at that time focused mostly on larger-bore domestic V-8's, ARIAS had the foresight to cater to the smaller-bore, higher-revving, hotter-running imports and domestic compacts.Today, Arias maintains an unmatched advantage in the import and domestic compact market. Over three decades of research and development have led to the ARIAS Sport Compact shelf line.FeaturesHi-tensile forged, not cast, billet material (4032 or 2618).CNC machined working surfaces. Optimized crowns for efficient combustion. Diamond-turned ellipsoidal skirt profile. All motor/Nitrous pistons feature lightweight, high strength construction.Turbo/Nitrous pistons feature durable, heavy-duty design.Sport Compact stocking kits include: forged pistons with pin fit, high carbon case-hardened wrist pins, chrome or moly faced top, cast 2nd, 3-piece oil ring set and carbon steel wire or spiral locks.