Head pipe difference 03 YZ to 05 WR450

The stock part #'s are different. But is their any real differance? Will an 03 YZ muffler bolt right up to my 05 WR head pipe?

The stock part #'s are different. But is their any real differance? Will an 03 YZ muffler bolt right up to my 05 WR head pipe?

yup....:banana:

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