Idler pulley ID

EmpirE231

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Can anyone tell me the part # for this idler pulley? Motor is an LS2  

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I searched and searched and thought I narrowed it down, ordered this part # and what showed up was not the same. 
 

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Looks like the one from ICT Billet?:

View attachment 88096
Is the one on my motor not an OEM ac delco part? I borrowed this one last trip when my bearing blew apart on my turnkey pulley and pitched my belt. I’d like to buy this same one so I can give it back to the guy who lent me it. I’ll be rebuilding the turnkey pulley and keeping the one on my motor as a spare. 

 
Is the one on my motor not an OEM ac delco part? I borrowed this one last trip when my bearing blew apart on my turnkey pulley and pitched my belt. I’d like to buy this same one so I can give it back to the guy who lent me it. I’ll be rebuilding the turnkey pulley and keeping the one on my motor as a spare. 
Not sure, but it doesn't look like any of the AC Delco's on summit's site for an LS2?  

CHEVROLET 6.0L/364 Chevy small block Gen III/IV (LS-based engines) ACDelco Idler Pulleys - Free Shipping on Orders Over $109 at Summit Racing 

 
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