I didn't get to have a lot of experience with it because I was stupid and used another pair of heads instead of the ones that were already on my engine. I ported them and then put them on my engine. I didn't think about the miles on the heads and had a valve go out after 4 miles. I couldn't tell any low end power loss, but I was on the throttle kind of hard to use the new power. Typ4's cams were "torquer" cams designed more for lower rpms while Justin's (idiperformance) are designed more for higher rpms. I'm not sure if there's that much difference since low and high rpms on our engines is relative. Would I recommend it? HELL YES! Now the bad news. The last I knew, Russ (Typ4) was considering not making any more. I certainly hope he does. It was a great product, and will be again when I install it in my 7.3 which I keep threatening to pull out of my truck and go through to seal up the oil leaks. If Russ does decide to quit the cam business, you can still use Justin's. As far as I know, he's still making his. Just like the turbo saying, any performance cam is better than a stock one. I'm not sure if it makes a big difference on a n/a engine, but I'm also running a Moose Jr. pump.By the way, be sure to check your valve recession before installing a bigger cam. This is important!
