Does Your Performance Exhaust Have Dents?

3002 tii · 11-12-2013, 10:17 AM

My 135is is only 2 months old and I noticed my piping has dents by the control arm and differential. I spotted this the other day when I put the car on the lift when I swapped to my winter wheels. I don't see how these dents could be made by hitting a pothole since the diff is bolted down to the subframe and he piping can't have that much flex. Is this normal?

The flat spot on bottom right looks normal but the kink on left side by control arm does not

Another dent by diff

kleach18 · 11-12-2013, 10:26 AM

My Performance exhaust looks the same. Came that way out of the box from the dealership.

Marc08EX · 11-12-2013, 10:27 AM

Mine has dents as well. I read a thread a few months ago saying that those dents are normal.

3002 tii · 11-12-2013, 11:10 AM

Thanks everyone for the confirmation although I still think the dents are unnecessary. I don't see why the control arm or diff would ever come in contact where they felt the need to put in these awkward kinks in the piping.

rking117 · 11-13-2013, 10:04 PM

could be clearanve dents to get around parts of suspension while in assembly?

Chunner · 11-13-2013, 10:40 PM

Gentlemen, those dam dents on your PE exhausts are the result of super German engineering to create the correct amount of back pressure.

......................jk... i made that up. BMW NA told me that those strategically located dents are perfectly normal to create ground clearance and for clearing the suspension components. Looks dam ugly to me but sounds so good.....

Kgolf31 · 11-14-2013, 06:25 AM

Sounds like a huge issue. I think you should ship the exhaust to me, and I'll ship my normal 128 exhaust to you...and I'll see if the dents are normal.

Warning: You will not get your exhaust back...ever

IEDEI · 11-14-2013, 08:28 AM

that's a part of the normal BMW assembly of parts. Get a hammer out and pound it all down til it fits!!! they get all hammer happy yknow.

firokzz · 12-13-2013, 10:38 AM

Quote:

Originally Posted by Kgolf31

Sounds like a huge issue. I think you should ship the exhaust to me, and I'll ship my normal 128 exhaust to you...and I'll see if the dents are normal.

Warning: You will not get your exhaust back...ever

Love the white font color!!!

11-12-2013, 10:17 AM	#1
3002 tii Lieutenant General 2286 Rep 12,565 Posts Drives: Z4 M, X5, GX460 Join Date: Apr 2008 Location: CT iTrader: (99) Garage List F15 X5 xDrive35i [8.75] E86 Z4 M [10.00] F10 550i (Retired) [9.17] F25 X3 xDrive35i (R ... [9.43] E82 135is (Retired) [9.50] E85 Z4 M (Retired) [9.41] E90 328i xDrive (Re ... [9.25] E86 Z4 3.0si (Retired) [9.24]	Does Your Performance Exhaust Have Dents? My 135is is only 2 months old and I noticed my piping has dents by the control arm and differential. I spotted this the other day when I put the car on the lift when I swapped to my winter wheels. I don't see how these dents could be made by hitting a pothole since the diff is bolted down to the subframe and he piping can't have that much flex. Is this normal? The flat spot on bottom right looks normal but the kink on left side by control arm does not Another dent by diff __________________ Follow for latest mods
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11-12-2013, 10:26 AM	#2
kleach18 Essayons 44 Rep 424 Posts Drives: 2013 135i Join Date: Aug 2012 Location: Dallas, Tx iTrader: (1)	My Performance exhaust looks the same. Came that way out of the box from the dealership. __________________ / 135i - M-Sport / 6-Speed / BMW Performance Exhaust / BMS Intake / JB4 Stage 2 ISO + Flex Fuel Wires / BMS 3.5in Down Pipe / CP-E Charge Pipe / Walbro 255 in-line fuel pump / BMS H8 AE / BMS SSK / APEX EC-7's with Nitto NT05's / COBB Tuning Sport Springs / Koni Yellows / Wagner Evo 1 / Blacklines / iCarbon Rear Diffuser / BMW Performance shift knob/boot / BMW Performance Steering Wheel /
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11-12-2013, 10:27 AM	#3
Marc08EX Lieutenant 139 Rep 575 Posts Drives: 2011 E82 135i Join Date: Aug 2011 Location: AZ iTrader: (5)	Mine has dents as well. I read a thread a few months ago saying that those dents are normal. __________________ 2011 135i 6MT \| Alpine White \| Terracotta Boston Leather \| M-Sport \| BMW Performance Exhaust Resonator Delete \| Active Autowerke Signature Exhaust \| BMW Performance Suspension \| Blackline LCI Taillights \| BMW Performance CF Spoiler \| CF Rear Diffuser \| PPK \| E92 M3 FSB \| Matte Black Kidney Grilles \| VMR V710 Jet Anthracite \| Michelin PSS \| BMW SS Pedals
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11-12-2013, 11:10 AM	#4
3002 tii Lieutenant General 2286 Rep 12,565 Posts Drives: Z4 M, X5, GX460 Join Date: Apr 2008 Location: CT iTrader: (99) Garage List F15 X5 xDrive35i [8.75] E86 Z4 M [10.00] F10 550i (Retired) [9.17] F25 X3 xDrive35i (R ... [9.43] E82 135is (Retired) [9.50] E85 Z4 M (Retired) [9.41] E90 328i xDrive (Re ... [9.25] E86 Z4 3.0si (Retired) [9.24]	Thanks everyone for the confirmation although I still think the dents are unnecessary. I don't see why the control arm or diff would ever come in contact where they felt the need to put in these awkward kinks in the piping. __________________ Follow for latest mods
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11-13-2013, 10:04 PM	#5
rking117 Lieutenant Colonel 118 Rep 1,668 Posts Drives: Z4 3.0i & 320i Join Date: Aug 2012 Location: USA iTrader: (0)	could be clearanve dents to get around parts of suspension while in assembly? __________________ Enjoying an E89 Z4, F30 320i and Fiat Abarth // E85 Z4 (sold), E82 128i (sold), Fiat Pop 500 (sold)
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11-13-2013, 10:40 PM	#6
Chunner Captain 153 Rep 964 Posts Drives: BMW 135is \| #341/586 Join Date: Jun 2013 Location: New York iTrader: (1) Garage List '13 BMW 135is #341/586 [9.50]	Gentlemen, those dam dents on your PE exhausts are the result of super German engineering to create the correct amount of back pressure. ......................jk... i made that up. BMW NA told me that those strategically located dents are perfectly normal to create ground clearance and for clearing the suspension components. Looks dam ugly to me but sounds so good..... __________________ 2013 BMW 135is Coupe \| Dinan Stage 3 \| M3 Subframe Bushings \| Dinan Monoball Joints \| Dinan Toe Links \| 1M Strut Bar \| MPS AS/3 - VMR 710's 18x8.5 ET45 / 18x9.5 ET50 \| MPSS - BMW 313's 18x7.5 / 18x8.5 \| Min Grey, Savanna \| Prem, Tech \| DCT \| Beast #341/586 \| *2021 BMW X7 M50i \| Alpine White \| Children Hauler*
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11-14-2013, 06:25 AM	#7
Kgolf31 Brigadier General 460 Rep 4,531 Posts Drives: 2007 Z4MC, 2012 128i Join Date: Sep 2008 Location: Ohio iTrader: (4)	Sounds like a huge issue. I think you should ship the exhaust to me, and I'll ship my normal 128 exhaust to you...and I'll see if the dents are normal. Warning: You will not get your exhaust back...ever
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11-14-2013, 08:28 AM	#8
IEDEI Banned 1130 Rep 4,686 Posts Drives: L'Orange Join Date: Jul 2013 Location: Brooklyn, NYC iTrader: (0) Garage List 2011 BMW 1M [8.40]	that's a part of the normal BMW assembly of parts. Get a hammer out and pound it all down til it fits!!! they get all hammer happy yknow.
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