Did anyone ever respond to your post on PDM cams? I hae been considering them, but find their "dyno" data a little strange. I have dyno'd two 4AGE engines and get 109hp at 6500rpm at the rear wheels. Both stock engines.Anyone ever used these on there 4AGE before? They yield a 25 whp gain on a 4age with bolt ons and work with existing internals. Seems like a good buy to me, but wanted to hear some first hand accounts.