Re: Questions on 2.5" vs 3" Exhaust
I think the mathematical answer is to run 3" to the mufflers, and then 2.5" behind if that alleviates your space concerns. Or 3" torque tubes off the headers that cone down to 2.5" ID maybe as the front of the headpipes. The further back the EX gas gets, the cooler and less pressure it has. This allows smaller space for full flow.
That MotorTrend video speaks to mufflers only? Please keep in mind the above thermodynamic relationship then. By the time EX gases get to the muffs, 2.5" v 3" may be rather academic from a pressure /volume pov.
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