CNC ported 225cc Dart Iron PRO 1 aluminum cylinder head.
CNC ported and port design by HVH.
We start with Dart 200cc/64cc head and CNC port them to 225cc intake runners and 72cc combustion chambers.
60+ hp gain over stock Dart heads!! Huge gains in torque!!
2.080" Intake valve job and 1.600" exhaust valve job.