Check the listing for details. 180cc TAIDA RACING CYLINDER HEAD GY6 *63mm BORE* 28/23 VALVES (54mm SPACING). Condition: New. Listed at 119.98 USD. TAIDA HIGH PERFORMANCE CYLINDER HEAD WITH STANDARD 54mm SPACINGFITS 63mm BORE CYLINDERS *NEW*LOOK AT THE PORTS IN THIS HEAD COMPARED TO MOST BIG BORE CYLINDER HEADS(SEE PHOTOS) INCLUDES CYLINDER HEAD VALVES (28/23) ALREADY INSTALLED HEAD REPLACMENT HARDWARE FITS STANDARD 150cc THRU 180cc GY6 MOTORS *TAIDA KITS CAN BE PURCHASED IN OUR STORE* FITS MOST CHINESE SCOOTERS, ATVS, AND KARTS WITH 150cc GY6 MOTORS FITS TAOTAO, JMSTAR, ROKETA, SUNL, TANK, PEACE, JONWAY , GATORAND MANY OTHERS *PLEASE READ ALL BELOW* SHIPPING ALL PARTS ARE SHIPPED WITH EVERYTHING LISTED. PARTS ARE SHIPPED SIGNATURE REQUIRED AT DROP OFF. RETURNS THERE ARE ABSOUTELY NO RETURNS ON ALL OF OUR RACING PARTS. ONCE YOU PURCHASE ANY RACING PARTS FROM US THEN THEY ARE YOURS. WARRANTY THERE IS NO WARRANTY ON ANY RACING PARTS. THIS PART SHOULD BE INSTALLED BY A PROFESSIONAL MECHANIC. SHIPS FROM SHELBY, NCS2