I bought a dropout for $5500 shipped from a junkyard to swap into my Eclipse and was going through the motor/trans to figure out which parts I needed to replace. I popped the valve cover and noticed a freshly rebuilt head with arp studs. I also took a peak at the clutch through the shift fork boot and found an act clutch. I then pulled the oil pan to check out the rotating assembly and found a freshly built shortblock with it looks like Eagle H-beam rods with arp 2000 bolts and Wiseco forged pistons. I had a hard time identifying the cams but I found 3d05 stamped into them. I called my buddy that had an 05 Evo that I put 272's in for and asked him to check out his stock cams to see what was stamped and it sure wasn't 3d05. I'm pretty sure the valve springs and retainers are stock, although I tested the retainers with a magnet and they are not magnetic so I'm thinking Titanium? I don't know what material the factory retainers are made out of but it's just speculation. If someone could help me figure out which cams these are that would be great.

 

Stock retainers are aluminum, so they're probably stock. The stock cams are hollow, I don't know of any aftermarket ones that are hollow so I'd guess those are stock. Nice score though.

 

If I'm not mistaken I believe the HKS regrinds and Helix cams are hollow as well.

 

Definitely a nice find

 

If you have cam installation kit, you could always measure the lift and duration.

 

It seems like the HKS cams you're referring to are only the IX intake cams. The Helix ones don't look like the ones in his pics. I'm still going with stockers.

 

HKS cams are a solid billet core. Helix did make a set of cams that were hollow. Those are the only aftermarket cams that I ever seen that were not from a solid core.

I bet stock