Originally Posted by mpalmer91
If you have the oem exhaust manifold, the oem mazdaspeed3 exhaust is 2.5" and pretty quiet. I havent heard it with a header yet
The speed3 has a turbo, so that would make it quiet.
Introduce Mr. Torsen to the mix
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Bigger brakes then you- D23 crew- D-Tech- Sedan Revolution= #131