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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Suspension | Chassis | Brakes > Chassis reinforcement plate (from CPM Japan)
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      01-19-2015, 09:53 AM   #1
tboooe
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Chassis reinforcement plate (from CPM Japan)

I came across this product from a Japanese company (CPM). Its chassis reinforcement plate that costs around $255. My Audi S5 benefited greatly something like this from Eurocode tuning (http://www.ecodetuning.com/shop/cart..._detail&p=1994). From the website (translated so its a little off but you get the idea):

By mounting the CPM LowerReinforcement, to suppress the fluctuation of the body due to unevenness of the road surface, by the tuning of the front and rear suspension born also ensure high-speed stability and improves the dullness of handling reaction such as during winding and lane change you. Also, I will give a synergistic effect, such as also to reduce the car creaking sound due to the effect of suppressing the distortion of the body.
Mounting also exchange with existing muffler hanger, or sandwich only of simple mounting a realization. Does not require any in the chassis frame processing, it is the only one of the aftermarket parts that it is to improve the function without having to sacrifice the very nothing.

http://cpmtech.jp/about.html





If this does benefit our cars, does someone in the US make something similar?

Last edited by tboooe; 01-19-2015 at 12:37 PM..
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      01-19-2015, 10:55 AM   #2
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Good find. I'm also interested in hearing others opinions.
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      01-19-2015, 12:38 PM   #3
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F it! At $250 I will buy one and have it installed when I have my car up a lift to do my muffler. I contacted them to see if they will ship to US.

That plate does look a bit flimsy. I would have thought something that has beefed up arms that connect to the edge of the car would be more effective. (like the Alu Kruez I linked above)
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      01-19-2015, 04:46 PM   #4
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i removed the original part which almost touches my exhaust it was the cause of some vibration/rattle at 1.3k rpm :s
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      01-20-2015, 10:00 AM   #5
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How about using oem F8x underbody brace

http://www.bmwblog.com/wp-content/up...arriage-06.jpg
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      01-20-2015, 10:02 AM   #6
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Quote:
Originally Posted by Bee Pee View Post
How about using oem F8x underbody brace

http://www.bmwblog.com/wp-content/up...arriage-06.jpg
Thank you! Looks similar to the CPM one. I wonder what the OEM one costs?
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      01-20-2015, 11:19 AM   #7
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Quote:
Originally Posted by Bee Pee View Post
How about using oem F8x underbody brace

http://www.bmwblog.com/wp-content/up...arriage-06.jpg
There you go!!!

OEM+
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      01-20-2015, 01:53 PM   #8
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Quote:
Originally Posted by F32 N55 View Post
There you go!!!

OEM+
yeah wonder if that would fit on the F36 and more importantly how much it will cost. The one from Japan is $250. Now I just need to see if a dealer there is willing to ship to US. I'm going to do this when I do my exhaust mod (with your diffuser!)
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      01-20-2015, 03:11 PM   #9
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It'll have a placebo effect and will certainly lighten your wallet. Of these 2 things I am certain.

Comparing the 2 pics, the OEM F8X piece looks to be made from aluminum vs steel for the OEM F3X.
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      01-20-2015, 03:32 PM   #10
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Placebo effect me damned!!!

I do know that the brace for my Audi S5 definitely made a difference. It stopped the creaking from the subframe, and steering was definitely more precise. That being said, I am not sure how such a small piece of metal can have any real impact like the monstrous brace on the S5.

I am a sucka for nicely machined hunks of metal. I once paid I think $750 for some machined race footpegs from Japan for my motorcyle. It didnt make me faster on the track but damn it looked gooooooood!
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      01-20-2015, 06:55 PM   #11
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Quote:
Originally Posted by tboooe View Post
Thank you! Looks similar to the CPM one. I wonder what the OEM one costs?
Item # 2 in the attached realoem page. Part no. 33312284647

http://www.realoem.com/bmw/showparts...81&hg=51&fg=80
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      01-20-2015, 06:57 PM   #12
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Quote:
Originally Posted by Bee Pee View Post
Item # 2 in the attached realoem page. Part no. 33312284647

http://www.realoem.com/bmw/showparts...81&hg=51&fg=80
Thank you! I just looked it up...$15!!! LOL! According to the sites I searched this part is already on my car. The CPM would replace this. I wonder how much more rigid the CPM one is?
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      01-20-2015, 07:08 PM   #13
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Thats interesting. Subframe connectors really helped my T/A, but this is more like just a tunnel brace, so it may not do as much. We'll see. If the car really starts rattling and squeaking bad, I'll pick one up. Much rather have full SFCs though.
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      01-20-2015, 07:15 PM   #14
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Quote:
Originally Posted by tboooe View Post
Thank you! I just looked it up...$15!!! LOL! According to the sites I searched this part is already on my car. The CPM would replace this. I wonder how much more rigid the CPM one is?
The part number I quoted is unique to m3/4 fxx. Your car is likely to have same as mine ie a connector plate made of pressed steel. The alloy one will be lighter and more rigid.
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      01-20-2015, 10:45 PM   #15
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fool and his money and all.
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      01-20-2015, 10:57 PM   #16
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fool and his money and all.
I assume you are calling me a fool?
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      01-21-2015, 01:40 PM   #17
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Quote:
Originally Posted by F32 N55 View Post
It'll have a placebo effect and will certainly lighten your wallet. Of these 2 things I am certain.

Comparing the 2 pics, the OEM F8X piece looks to be made from aluminum vs steel for the OEM F3X.


Make friends with your local machine shop and have them cut you one cheap
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      01-22-2015, 04:18 AM   #18
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Quote:
Originally Posted by dreamspeed View Post


Make friends with your local machine shop and have them cut you one cheap
Why bother talking to your local machine shop when oem parts are ~$20-25 [including 6 longer bolts] delivered to your door.......
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      01-22-2015, 09:20 AM   #19
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Quote:
Originally Posted by Bee Pee View Post
Why bother talking to your local machine shop when oem parts are ~$20-25 [including 6 longer bolts] delivered to your door.......
You are right I could but hopefully an aftermarket part would be stiffer than OEM?
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      01-22-2015, 10:55 AM   #20
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I plan to remove existing pressed steel bracket, install oem M3/4 alloy bracket as a spacer, with longer bolts under the existing pressed steel bracket, increasing stiffener effect.
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      01-22-2015, 04:32 PM   #21
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Curious how this turns out. It's interesting that CPM is in addition to, and doesn't look like they removed anything.
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      10-25-2015, 04:22 PM   #22
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Any updates on this?
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