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Thread Owner
I watch their weekly Vlogs on Fridays. It's pretty much all Dodge, including the SIXPACK. They take questions throughout it also. He updates mods to his like he always does. He said that a downpipe, single 3" cat back, CAI and ported intake did NOT improve horsepower, just sound. They said that it did allow the max boost to be reached easier though. He said once custom tuning is available, things will be different though. The JB4 increases boost, hence more power.