KPMI, prowadnica zaworu dolotowego. Żeliwo. +.002″

Cast iron. Comes with special shoulder for ease of installation. Takes OEM valve seals. Shortened to accept valve lifts up to .600″. Cast iron offers maximum durability and wear resistance. Perfect for long distance touring applications. It is the standard since the invention of the piston engine. Note: Standard non-oversize dimensions (for reference only) are 0.5620″ O.D. (14.27mm); .3085″ I.D. (7.84mm); 2.100″ OAL (53.34mm).