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Thanks guys. Makes sense and is very helpful. Sounds like the RarlyL8 Headers are best for a more modified engine, vs my stock set up now. Perhaps after a 3.4 build. I was hoping for something now that would be a nice bump with stock and also work for the 3.4 upgrade. Mid range torque is important for my street use, so 31 primaries seem important, if I understand this correctly. I wonder if 1 5/8 OD would reduce mid range torque on a stock engine vs 1 1/2 like SSIs, which seem to help more in that area?
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