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Message: [QUOTE="R&D Injection, post: 1431006, member: 19712"] If your trying to tell me 30-50% gains in cylinder head flow didn't make a difference, I feel like maybe your missing something. People can say what they want, cylinder head flow = more efficient power across the whole power curve of any engine, diesel or not. It will act completely different. Ive yet to see any custom valve covers, runners, or anything of that nature for the 6.7. Its all just been talk to my knowledge. We've seen significant gains with cnc portwork but everyone has their own opinions.... [/QUOTE]

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