It is an LS1-LS6 Damper, the LS2 and up dampers have different hole spacings. Its a GM part, but they dont make it anymore, only a few early LS1s had this part. Thats why its so expensive.

I also bought my C5R chain from katech. Strongest single roller made.

http://store.katechengines.com/dampe...-ls6-p260.aspx

 

Damn that thing is expensive...lol Yeah I knew they stopped making them and GM did away with the part but left the mounting holes there. Might pick this up though..

 

Mine did not have have the holes. I drilled and tapped them when I was installing the cam and timing chain.

 

really!?! that is wired.. I have the holes.. Thanks for the link, def going to pick up.. Since I had to put my motor back together anyways...