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It is a simple deduction really. A quiet exhaust is going to subtract power. More restriction gives less noise and vice versa.
I miss my twister or in one case twisters, but I dont have them on my truck now for a reason. It seems stupid to build up power with injectors, turbos, and EGT adding mods and then bottle up the exhaust. Perhaps a 5" system is less restrictive and the HP loss is less? I tested a 4".
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