BMW 3-Series (E90 E92) Forum - View Single Post - POLL: How many of you have the turbo siren sound from your stock turbos?

gangzoom · 11-15-2012, 02:59 PM

I noticed a howl/noise from my turbos after having AR design Hi-flo Cats installed but have to say its no where near like the noise in first post, also running JB4 and Forge intercooler. No smoke or reduced performance (quite the opposite infact

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11-15-2012, 02:59 PM	#45
gangzoom Brigadier General 1685 Rep 3,285 Posts Drives: E90 335i M sport Join Date: Jun 2011 Location: Leicester iTrader: (1)	I noticed a howl/noise from my turbos after having AR design Hi-flo Cats installed but have to say its no where near like the noise in first post, also running JB4 and Forge intercooler. No smoke or reduced performance (quite the opposite infact )
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