Who Makes This Piston? -XR600R

I have a 93 XR 600 and need to replace the rings but cannot find the manufacturer of this piston. Can anyone help me out??

here is the info:

(on intake side)

H30C7

(on exhaust side)

0.50mm

4366P2

HX

4366 is the Wiseco number for their XR600 11:1 piston. Contact Wiseco with your piston info for the correct rings at 1-800-321-1364.

4366 is the Wiseco number for their XR600 11:1 piston. Contact Wiseco with your piston info for the correct rings at 1-800-321-1364.

cool, thanks!