Quote:
Originally Posted by MYTA21
Matters such as required back pressure are also a factor- but as I said I'm not an expert.
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What required backpressure ?
I'm no expert either, but I know this notion that backpressure is required in exhaust system is a complete myth. The truth is in fact the opposite - backpressure is bad!
Paul, a reduction in exhaust diameter after the resonator from 2.5" to 2" isn't ideal, but on your car it shouldn't make too much difference. It also depends on what type of resonator it is and how much restriction it introduces.
Exhaust theory, which is inextricably linked to intake system theory, is a complex science because there are so many factors involved. But at the end of the day the exhaust system needs to get the exhaust gases away from the engine as
fast as possible while reducing noise to an acceptable level.