Quote:
Originally Posted by Taskmaster
I don’t get the appeal for the 135i muffler.
The stock stuff doesn’t flow that well, and is heavy.
But it’s quiet.
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I have seen pics of the inside of each mufflers, the 135i muffler flows better than the 328i muffler, it is a better design and the pipes are slightly bigger. It is a middle ground between the stock and a performance muffler
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E90 328i n52 auto, 3 stage IM, k&n drop in, charcoal delete, silicone boot, ebay headers, secondary cats delete, bpc tune. MILVs (soon), MT swap (planning)