... 3 for exhaust, We can Weld the TIP to the top of the exhaust valve,and also can weld the ... Stellited material to valve seat and valve stem of exhaust ... TYPING on our product if you need. 7. We do OSVAT and QUEEN packing ,or following your speical request.It ... ,Valve guide,valve seat,cylinder head,rocker arm also can be offered!Our main markets include South ...