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      07-13-2012, 03:48 PM   #67
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Drives: 2011 335i mSport Sedan E90 N55
Join Date: Apr 2012
Location: California

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2011 335i  [4.33]
Originally Posted by joec500 View Post
I don't have the PE, but did install those tips in my Mtech rear...and it really completes the rear look of our cars.

Just installed 3.5 Dimisa Tips on Performance Exhaust

OP is correct

Sound does change

I have n55 and PE + PPK

After Dimisa tips

It got little quieter about 5-10%

More noticeably the n55 gurgle is affected

Although still there , it's volume and frequency have decreased

They look cool

But be warned of subtle noise change

I do believe that beloved gurgle of the N55 PE is altered in a decreased manner

Decrease is not extreme
But it is there

Install is complicated

Not all shops will attempt

Am I happy?

They look great, unsure worth loss of sound

Considering PE is near 2k to get that damn burble...
2011 335i Space Grey Msport E90
BMW Performance Exhaust
PPK Stage I
Lux H8 , HID Fog lights 5k
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      07-13-2012, 04:44 PM   #68
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Drives: 2007 335xi
Join Date: Apr 2012
Location: Encinitas

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Originally Posted by dimisa1977 View Post
Replacing exhaust tips does enhance exhaust note, any tips that is. The larger the opening, the more throaty the sound. By way of example, think of a saxophone versus a tuba. It's simple sound/audio architecture, really.
Which is exactly why I sent back my 3" powder black tips and reordered 4". Much better sound. To the OP, you shouldn't have experienced a quieting effect from larger tips. Like the tube and sax example, think of an old school megaphone (one that doesnt use electronic volume enhancing). Sound should be louder because it is being angled OUT of the exhaust instead of a straight tube. (think of when u were a kid and talked through a paper towel cardboard roll to make your voice sound funny).

Did the welder cut off the actuator? Have you done the sound mod? (either golf tee or unplug). Other than that I have no idea
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