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Free flowing intake and exhaust will only get you so much. I think the main reason they're going with larger displacement is they finally have the engine controls to make the bigger engines more emissions friendly. Another reason for them to use larger engines rather than turbos is for warranty. With no turbo or supercharger they don't have to worry about it being so easy for people to raise the boost and cause extra warranty repairs. Look at the new cobra. You can spend next to nothing for a smaller supercharger pulley and gain 50hp. I guarantee the small pulleys won't be on the car when they take it to the dealer for a new supercharger!
dave
posted by 68.10.24...
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