Are Coupe and convertible trunk spoilers the same?

WPG D33Z · 03-12-2012, 03:13 PM

I've been looking for a trunk spoiler to put on my vert and I see some that say coupe only? The trunks look the same and it doesn't move when the roof goes down. Is there really a difference or will I be good to go with a CF JB Speed?

Xios135 · 03-12-2012, 07:06 PM

There is a slight difference in trunks. I got an iCarbon spoiler last year which was made for coupes and it fits my vert fine. I can't speak for any other brands though.

RoundelM3 · 03-13-2012, 09:20 AM

A friend of mine had a small lip spoiler that he removed from the trunk of his 08 135i coupe, and when we tried it on my 11 128i convertible, the trunk edge had a different shape and the spoiler didn't match.

WPG D33Z · 03-13-2012, 10:39 AM

I might have one for sale in a couple weeks then :s I found one on ebay that said it fits the convertible. Fingers crossed!

fancyfl1ght · 03-13-2012, 10:44 AM

with the top down, the vert is aerodynamically unstable to justify a spoiler, unless your doing it for just looks. . . .

pinmagic · 03-13-2012, 10:55 AM

Quote:

Originally Posted by WPG D33Z

I might have one for sale in a couple weeks then :s I found one on ebay that said it fits the convertible. Fingers crossed!

Be careful there - I just wrote to 2 ebay sellers who listed spoilers as compatible with both the coupe and convertible, and asked them each to specifically confirm compatibility with the vert. One wrote back to say that it wasn't compatible (even tho their listing clearly says E82 & E88). The other was clearly a customer service agent of limited English skills who simply said "we only list items compatible with the car" (or somesuch).

If you find something that works, let us know.

pinmagic · 03-13-2012, 10:56 AM

Quote:

Originally Posted by fancyfl1ght

with the top down, the vert is aerodynamically unstable to justify a spoiler, unless your doing it for just looks. . . .

And with the top up....?

mdputnam · 03-13-2012, 11:04 AM

Quote:

Originally Posted by fancyfl1ght

with the top down, the vert is aerodynamically unstable to justify a spoiler, unless your doing it for just looks. . . .

Coupe or Vert the tiny little CF spoiler is mostly for show, to my knowledge no one has demonstrated and BMW hasn't claimed anything more.

PS I'd love to see data to the contrary! I wouldn't be surprised if BMW tested it in their wind tunnel at some point. Usually to be effective you need to get the spoiler out of the air flow boundary layer, that's the idea of pop up spoilers found on many Porsches

03-12-2012, 03:13 PM	#1
WPG D33Z First Lieutenant 23 Rep 316 Posts Drives: 2008 135i vert Cobb Stage2 Join Date: Mar 2012 Location: Winnipeg, Canada iTrader: (1)	Are Coupe and convertible trunk spoilers the same? I've been looking for a trunk spoiler to put on my vert and I see some that say coupe only? The trunks look the same and it doesn't move when the roof goes down. Is there really a difference or will I be good to go with a CF JB Speed? __________________ 2008 SGM 135i Cobb Stage 2 FBO 2008 TS X3 MSport KW V2
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03-12-2012, 07:06 PM	#2
Xios135 First Lieutenant 24 Rep 365 Posts Drives: 2014 MB CLA Edition 1 Join Date: Jan 2011 Location: Philadelphia iTrader: (0) Garage List 2010 BMW 135i Conve ... [1.00]	There is a slight difference in trunks. I got an iCarbon spoiler last year which was made for coupes and it fits my vert fine. I can't speak for any other brands though. __________________ GONE *135i Vert-Montego Blue M-Sport-6MT, BMS DCI, JB+, CF iCarbon Spoiler, Matte black grills, stock diffuser mod, Ink Black powder coated 264s,*
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03-13-2012, 09:20 AM	#3
RoundelM3 Major General 1833 Rep 6,986 Posts Drives: 15 F80 M3, 22 G01 X3 30i Join Date: Apr 2010 Location: Wendell, NC iTrader: (2) Garage List 2022 BMW X3 [9.83] 2015 BMW M3 [6.50]	A friend of mine had a small lip spoiler that he removed from the trunk of his 08 135i coupe, and when we tried it on my 11 128i convertible, the trunk edge had a different shape and the spoiler didn't match. __________________ 2015 F80 ///M3 Sedan 7DCT Tanzanite, 2022 X3 sDrive30i 8AT Brooklyn Grey
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03-13-2012, 10:39 AM	#4
WPG D33Z First Lieutenant 23 Rep 316 Posts Drives: 2008 135i vert Cobb Stage2 Join Date: Mar 2012 Location: Winnipeg, Canada iTrader: (1)	I might have one for sale in a couple weeks then :s I found one on ebay that said it fits the convertible. Fingers crossed!
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03-13-2012, 10:44 AM	#5
fancyfl1ght Lieutenant 64 Rep 478 Posts Drives: 2016 BMW 228i Join Date: Aug 2010 Location: Pasadena CA iTrader: (1)	with the top down, the vert is aerodynamically unstable to justify a spoiler, unless your doing it for just looks. . . . __________________ Alpine White BMW 228i (Stripper Special with Lighting Package as the ONLY option), HD-LINK IW06B-N23 Backup Camera & HDMI Input, Technic ASD Removal Harness (Wire Nut Mod), Technic Hifi Harness, Focal FDP 6.900, Hertz Energy ECX 100.5.
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