Quote:
Originally Posted by White1
I have a 135i muffler that a buddy gave me, i have a 128i, he told me that the stock 135i muffler isd the same as the 128i performance muffler. I just want to know if its worth putting the 135i muffler on my 128i, or will it end up being the same thing as what came on my 128i?
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First of all, are you talking about JUST the muffler, or the entire exhaust system? It's not just a muffler and tips that are replaced with the performance exhaust.
Next, the simple answer to your question is no, the 135's exhaust is not the same as the 128's "performance" exhaust. The stock 135 exhaust has the same butterfly valve as the stock 128, which leads me to conclude that they're the same if not similar. The performance exhaust has no flap and a different muffler (where the sound is generated).
Note also: putting a 135 part on a 128 doesn't necessarily mean your warranty is going to stay intact.
Speak to your dealer, see what they say. Don't trust what you read on forums, because most of us are just speculating anyway. If you really want a louder exhaust, go with the performance exhaust. People really seem to like it.