BMW 3-Series (E90 E92) Forum - View Single Post

MOD.Works · 09-22-2023, 12:18 AM

They are right.
The silicone boot resonates and its shape changes, which slightly affects the air flow. Hard pipe is better, but I don't think the difference is big.

09-22-2023, 12:18 AM	#2
MOD.Works Private First Class 46 Rep 109 Posts Drives: BMW 130 Join Date: Nov 2021 Location: Europe iTrader: (0)	They are right. The silicone boot resonates and its shape changes, which slightly affects the air flow. Hard pipe is better, but I don't think the difference is big.
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