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Message: [QUOTE="Morgan@Midwest Diesel & Auto, post: 1321550, member: 8143"] I've told many customers, if they don't have flow numbers for their heads, they do not really know what cam to put in. If your head quits flowing air at .380" total lift, and you put in a .500" gross lift cam..... Well, I could go on for days about a whole lot of things. Like the difference that duration makes in a boosted engine, or the exhaust valve timing.... Unfortunately 90% of the people don't know what they need and don't have the info to properly size one to their needs. Part of that falls on the customer for wanting to just put a cam in with no idea of the rest of their setup. The other is on the person selling something that they have no idea how it actually works. On stock heads the power gain will be minimal for any cam and some cams will definitely loose power if used in combination with stock heads. Your best bet is to get information on what you have first them call and talk to someone who knows what they are grinding/selling. To be very clear, I am not dogging any cam manufacturer or company selling them that is competent. Because we use a certain brand, doesn't mean they are better etc... We have our own stuff ground for our own stuff as well. Nothing new. I've had cams custom ground for years and years.... Before we ever though of a 6.0 aftermarket cam. I am not going to tell you "this brand" cam is better or makes "this much power". I can however help you size something, if you take the time to have your info correct and know what you are going for. And so will others. It will just take a phone call to get there with anyone. But you will be a lot more likely to get something to fit your needs. Sent from my iPhone using Tapatalk [/QUOTE]