Thoughts on Polyurethane Lips/Diffuser?

KwlAznKid · 12-14-2016, 02:26 AM

For those of you who have Polyurethane lips have you noticed if it has caused your bumper to sag/crack or any adverse effects? I bought one off ebay and it felt insanely heavy, I returned it and have been casually browsing for another one but all of them seem to be polyurethane.

Anyone with polyurethane lips care to share their experience?

Thanks

monterey · 12-14-2016, 07:41 AM

You have to be extra careful when installing them. They can parachute on you and you can end up running over your own lip on the freeway lol.

shimmy23 · 12-14-2016, 07:57 AM

i don't see lots of forum guys running plastic lips and i can understand your concerns about the weight. like Monterey mentioned, depending on the weight and design it could really drag some wind.

with proper installation it should be fine though. what lip design are you looking at?

azndrunk74 · 12-14-2016, 11:33 AM

which lip did you try? i had the polyurethane challenge rep before and it was insanely light. i didn't have any problems with it except for the fact that it hung super low and i scraped pretty often.

yahoo_mks · 12-14-2016, 11:44 AM

I have a PU v1 replica, $100 on eBay. Had to drill screw holes to mount on either bumper end; perfect fit on one side, about 8/10 on other.

Looks fine from a distance and no issues with weight or additional scraping; also protecting bumper and preventing me from spending more money on cf upgrade pieces...

E46M3forRay · 12-14-2016, 01:31 PM

I had the challenge poly lip and had no issues. It held up and never sagged despite My driveway being steep so I scrape all the time.

See sig below ... that's a challenge lip at the track :P

becausephilchow · 12-14-2016, 08:12 PM

I would love PU lips. Hold up to scratching so much better, especially with how low almost all lips on the E9X sit anyways.

Personally, I don't love CF, so, I'm happy with PU and painting it.

Tracyis300 · 12-14-2016, 09:34 PM

I have the gts rep and it holds-up very good. Minor fitment issues at first! But with a little sanding and paint, it came out perfectly. Once I skewed it into the bumper, everything was spot on. It's a little heavy, but not to were it will disrupt the bumper.

The only problem that i have is that my bumper got warped on the lower right side due to the CF lip I had on there at first.
I was backing out of a driveway and the damn thing ripped off

(CF is too stiff, so if it hooks onto something? It will pull and then rip off).
The damage isn't night & day, it just sticks out by a little less than half a inch from the right air duct. You will have to get up in personal to notice it.

I will pick a PU lip over a CF lip any day.

KwlAznKid · 12-17-2016, 05:24 PM

hm.. thanks for the input guys, the lip i bought was a vorsteiner rep in PU and i didn't weigh it but honestly if I had to guess it was at least 20lbs or more! are most of your guys' PU lips that heavy? maybe i just got it from a bad vendor?

12-14-2016, 02:26 AM	#1
KwlAznKid Brigadier General 354 Rep 3,036 Posts Drives: BMW/MERCEDES/PORSCHE Join Date: Jun 2005 Location: Los Angeles/Fremont USC/UCSD Alum iTrader: (6)	Thoughts on Polyurethane Lips/Diffuser? For those of you who have Polyurethane lips have you noticed if it has caused your bumper to sag/crack or any adverse effects? I bought one off ebay and it felt insanely heavy, I returned it and have been casually browsing for another one but all of them seem to be polyurethane. Anyone with polyurethane lips care to share their experience? Thanks __________________ BMW E93 M3 / Mercedes Benz W209 CLK500 BMW E64 650I(sold) / BMW E92 328I(sold) / BMW E46 M3(sold) / BMW E92 335I(sold) Porsche 996 911 C2(sold) / BMW E46 325CI(totaled)
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12-14-2016, 07:41 AM	#2
monterey Major 339 Rep 1,239 Posts Drives: 2008 M3 Join Date: Mar 2016 Location: United States iTrader: (1)	You have to be extra careful when installing them. They can parachute on you and you can end up running over your own lip on the freeway lol.
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12-14-2016, 07:57 AM	#3
shimmy23 F15 daddymobile 2350 Rep 3,510 Posts Drives: GS X5 Join Date: Aug 2011 Location: WA iTrader: (3)	i don't see lots of forum guys running plastic lips and i can understand your concerns about the weight. like Monterey mentioned, depending on the weight and design it could really drag some wind. with proper installation it should be fine though. what lip design are you looking at?
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12-14-2016, 11:33 AM	#4
azndrunk74 Major 612 Rep 1,326 Posts Drives: Frozen Black F10 M5 Join Date: Nov 2012 Location: Bay Area, CA iTrader: (13)	which lip did you try? i had the polyurethane challenge rep before and it was insanely light. i didn't have any problems with it except for the fact that it hung super low and i scraped pretty often. __________________ 2014 Frozen Black F10 M5 \| Agency Power HFC Downpipes \| Custom Open Flash Stage 2 Tune \| KW HAS kit \| 3D Design Lip \| 3D Design Skirts \| 3D Design Spoiler \| IND Front & Rear Reflectors \| IND M5 Badge \| M Performance Steering Wheel \| M Performance CF Shift Knob \| Pedal Haus Pedals & Paddles \| Turner Exhaust \|
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12-14-2016, 11:44 AM	#5
yahoo_mks Enlisted Member 18 Rep 41 Posts Drives: 2011 M3 E93 Join Date: Sep 2016 Location: California iTrader: (0)	I have a PU v1 replica, $100 on eBay. Had to drill screw holes to mount on either bumper end; perfect fit on one side, about 8/10 on other. Looks fine from a distance and no issues with weight or additional scraping; also protecting bumper and preventing me from spending more money on cf upgrade pieces...
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12-14-2016, 01:31 PM	#6
E46M3forRay Güdentyte 1156 Rep 1,196 Posts Drives: GT3 & 1M Join Date: Jul 2010 Location: SF Bay Area iTrader: (9) Garage List 2023 Model 3 [6.50] 2022 T4R TRD Pro [5.00] 2011 1M [6.67] 2014 991.1 GT3 [10.00]	I had the challenge poly lip and had no issues. It held up and never sagged despite My driveway being steep so I scrape all the time. See sig below ... that's a challenge lip at the track :P __________________ CURRENT - 991 GT3 \| Future Classic 1M \| Model 3 \| T4R TRD Pro Lime Rush SOLD - MB M2 CS \| SMB F80 M3 CS \| E90 M3 \| E90 335i \| E46 M3 Vert \| E39 M5 \| E34 525i
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12-14-2016, 08:12 PM	#7
becausephilchow Lieutenant 175 Rep 513 Posts Drives: 08 E90 M3 Join Date: Mar 2014 Location: Hong Kong iTrader: (2)	I would love PU lips. Hold up to scratching so much better, especially with how low almost all lips on the E9X sit anyways. Personally, I don't love CF, so, I'm happy with PU and painting it.
	Appreciate 0 Quote

12-14-2016, 09:34 PM	#8
Tracyis300 Lieutenant 108 Rep 536 Posts Drives: 09 E90 M3 Join Date: Sep 2014 Location: Los angeles iTrader: (0)	I have the gts rep and it holds-up very good. Minor fitment issues at first! But with a little sanding and paint, it came out perfectly. Once I skewed it into the bumper, everything was spot on. It's a little heavy, but not to were it will disrupt the bumper. The only problem that i have is that my bumper got warped on the lower right side due to the CF lip I had on there at first. I was backing out of a driveway and the damn thing ripped off (CF is too stiff, so if it hooks onto something? It will pull and then rip off). The damage isn't night & day, it just sticks out by a little less than half a inch from the right air duct. You will have to get up in personal to notice it. I will pick a PU lip over a CF lip any day.
	Appreciate 0 Quote

12-17-2016, 05:24 PM	#9
KwlAznKid Brigadier General 354 Rep 3,036 Posts Drives: BMW/MERCEDES/PORSCHE Join Date: Jun 2005 Location: Los Angeles/Fremont USC/UCSD Alum iTrader: (6)	hm.. thanks for the input guys, the lip i bought was a vorsteiner rep in PU and i didn't weigh it but honestly if I had to guess it was at least 20lbs or more! are most of your guys' PU lips that heavy? maybe i just got it from a bad vendor? __________________ BMW E93 M3 / Mercedes Benz W209 CLK500 BMW E64 650I(sold) / BMW E92 328I(sold) / BMW E46 M3(sold) / BMW E92 335I(sold) Porsche 996 911 C2(sold) / BMW E46 325CI(totaled)
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