Apex Racing Cylinder Head Yamaha YZ250 YZ 1999 - 2023 SX DOME Up for sale is a used Apex Racing Cylinder Head (DOME) Yamaha YZ250 YZ 1999-2023 SX DOME! THIS ITEM IS ONLY COMPATIBLE WITH THE APEX RACING CYLINDER BILLET CYLINDER HEADS. THIS IS THE SX DOME MORE SUITED FOR FASTER SINGLE TRACK AND SX. THE DOME ONLY HAS 2 HOURS ON IT AND WORKS AS IT SHOULD. AD IS FOR THE DOME ONLY NOT WHOLE HEAD! THANK YOU MESSAGE FOR ANY QUESTIONS!