Exhaust whistling at high rpm, what's wrong?

nxxxxxxxxx · 04-19-2012, 11:02 PM

hi there,

I've recently installed the Aspec quad exhuast system on my E92 330i Coupe, and the exhaust has this high pitch whistling noise around 4000rpm to redline at almost every gears. Does anyone if this is normal or there are something wrong with the exhaust?

It is not a full catback system and it is one of those quad exhaust with a single muffler with tips on the left and a welded pipe with welded tips that goes to the right side.

［edit] My only engine mod is the AFE Cold Air Intake

I've checked every welded locations, and I don't notice any air leak. Please help cause this whistling noise is really bugging me.

Thank you very much.

gtabfknkdnme · 04-19-2012, 11:22 PM

Alvine90 · 04-20-2012, 02:03 AM

Quote:

Originally Posted by gtabfknkdnme

exactly what I expected when I clicked this thread

M3TA5IN · 04-20-2012, 10:11 AM

My M3 does this and it's cuz I have an exhaust leak at the mid pipe section. Need to replace the gasket. That's my problem anyway

mookie45 · 04-20-2012, 10:36 AM

hide your kids, hide your wife!!!

nxxxxxxxxx · 04-20-2012, 11:53 AM

edirtaynine · 04-20-2012, 12:14 PM

might just be the way that muffler was designed

g_rant · 04-22-2012, 09:32 AM

Whistle tips?!

gunnerxq · 04-22-2012, 12:25 PM

Quote:

Originally Posted by mookie45

hide your kids, hide your wife!!!

You forgot hide your husbands

04-19-2012, 11:02 PM	#1
nxxxxxxxxx Private 5 Rep 65 Posts Drives: BMW 330i Coupe Join Date: Mar 2012 Location: Shanghai, China iTrader: (0)	Exhaust whistling at high rpm, what's wrong? hi there, I've recently installed the Aspec quad exhuast system on my E92 330i Coupe, and the exhaust has this high pitch whistling noise around 4000rpm to redline at almost every gears. Does anyone if this is normal or there are something wrong with the exhaust? It is not a full catback system and it is one of those quad exhaust with a single muffler with tips on the left and a welded pipe with welded tips that goes to the right side. ［edit] My only engine mod is the AFE Cold Air Intake I've checked every welded locations, and I don't notice any air leak. Please help cause this whistling noise is really bugging me. Thank you very much. Last edited by nxxxxxxxxx; 04-20-2012 at 12:51 AM..
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04-19-2012, 11:22 PM	#2
gtabfknkdnme 5 Star General 122 Rep 2,631 Posts Drives: E82, F30 Join Date: Jul 2010 Location: CA iTrader: (7)
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04-20-2012, 10:11 AM	#4
M3TA5IN SRS BZN 14 Rep 159 Posts Drives: 06 330i Join Date: Apr 2011 Location: PA iTrader: (0)	My M3 does this and it's cuz I have an exhaust leak at the mid pipe section. Need to replace the gasket. That's my problem anyway __________________
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04-20-2012, 10:36 AM	#5
mookie45 Major 771 Rep 1,269 Posts Drives: 2017 AW 340i M-Sport Join Date: Aug 2011 Location: Brickell iTrader: (4)	hide your kids, hide your wife!!!
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04-20-2012, 11:53 AM	#6
nxxxxxxxxx Private 5 Rep 65 Posts Drives: BMW 330i Coupe Join Date: Mar 2012 Location: Shanghai, China iTrader: (0)
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04-20-2012, 12:14 PM	#7
edirtaynine Major General 84 Rep 6,088 Posts Drives: e92 Join Date: Mar 2011 Location: SoCal iTrader: (0)	might just be the way that muffler was designed
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04-22-2012, 09:32 AM	#8
g_rant Lieutenant Colonel 40 Rep 1,601 Posts Drives: F10 M5 Join Date: Aug 2010 Location: Bay Area, CA iTrader: (2)	Whistle tips?! __________________
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