We engineered the new Dart aluminum Honda block to solve the shortcomings of production blocks used in high-performance and competition applications. We offer the Dart block in B18 and B20 versions with 81.5mm & 84.5mm bores. Both are built to withstand the extreme cylinder pressures created by turbochargers and nitrous oxide injection. We increased wall thicknesses in all critical areas and beefed up the bottom end with steel main bearing caps. Best of all, Dart blocks are compatible with production Honda cylinder heads, internal components and accessories. We added the features that sport compact racers and performance enthusiasts need to build powerful and reliable engines.

Part Number	Main Bearing Dia.	Deck Height	Cyl Bore Dia.	Description	Price	In stock	Purchase
31496701	Standard	211.5 mm	81.5 mm	B-18	$2,169.00	Yes
31496801	Standard	211.5 mm	84.5 mm	B-18	$2,169.00	Yes
31496702	Standard	226 mm	81.5 mm	B-20	$2,169.00	Yes
31496802	Standard	226 mm	84.5 mm	B-20	$2,169.00	Yes