BMW 3-Series (E90 E92) Forum - View Single Post - DIY: 335i Exhaust Sound Mod. Better, and even easier than golf tee mod.

darkphantom · 07-05-2008, 12:39 AM

it's noticeable on the 335i's because the valve is closed on startup and suppressed under 2500 RPM, but after that it opens up. I don't think the 330i's have that type of system since they only have one muffler....correct me if i'm wrong.

07-05-2008, 12:39 AM	#158
darkphantom Banned 595 Rep 5,946 Posts Drives: E93 335i Join Date: Aug 2007 Location: The place for Bimmers iTrader: (4)	it's noticeable on the 335i's because the valve is closed on startup and suppressed under 2500 RPM, but after that it opens up. I don't think the 330i's have that type of system since they only have one muffler....correct me if i'm wrong.
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