280 sxs piston type please help question

Hey question here

 

I ordered a sxs 280 big bore kit off ebay.

 

It arrived with a vertex piston in the kit.

 

My question is this a replacement piston or a oem piston? 

 

Thanks in advance

 

 

Vertex is OEM

They make the oversize pistons as well

I have a phone call into north America KTM    see what they say

Edited by othg148

KTM said yes this is a stock oem piston made by vertex for KTM

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