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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > M3 undertray



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      06-10-2022, 07:18 PM   #1
tylerhart_21
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M3 undertray

Yes it may sound a little crazy but hear me out. Is it possible to run the m3 under tray? I looked at the bumpers of both m and non-m cars and the bolts should line up. This will then inter allow me to use the skid plate from the m3 as well. So when everything is said and done more air will flow through the rad (while driving) and the front end will be stiffened. I don't want to pull the trigger to early so let me know your thoughts and or ideas.
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      06-15-2022, 08:35 AM   #2
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It's been done, doesn't bolt straight up. Think someone had to drill and add rivnuts somewhere (subframe?) but I forget. Consult Google.
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      06-16-2022, 11:21 AM   #3
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See this thread

https://www.e90post.com/forums/showthread.php?t=1579797

post #243 onward.
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E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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      06-16-2022, 12:25 PM   #4
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Yeah the fitting of the m3 subframe frame brace but as well as this. [IMG]https://c1552172.ssl.cf0.rackcdn.com/552400_x800.webp[/IMG]
Probably have to find a company to make on or make one myself. I am trying to get more air flowing through the radiator while driving.
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      06-16-2022, 07:09 PM   #5
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Quote:
Originally Posted by tylerhart_21 View Post
Yeah the fitting of the m3 subframe frame brace but as well as this. [IMG]https://c1552172.ssl.cf0.rackcdn.com/552400_x800.webp[/IMG]
Probably have to find a company to make on or make one myself. I am trying to get more air flowing through the radiator while driving.
Are you overheating?
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      06-16-2022, 08:09 PM   #6
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Quote:
Originally Posted by desertman123 View Post
Quote:
Originally Posted by tylerhart_21 View Post
Yeah the fitting of the m3 subframe frame brace but as well as this. [IMG]https://c1552172.ssl.cf0.rackcdn.com/552400_x800.webp[/IMG]
Probably have to find a company to make on or make one myself. I am trying to get more air flowing through the radiator while driving.
Are you overheating?
No I am not, just want to keep things cooler. And when I do want to track the car I will be safe. Probably not the best for daily driving but couldn't hurt if I tried.
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      06-19-2022, 04:27 PM   #7
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I have done some research to see if this idea realistic. This is with the Porsche smile vent for an idea. I don't have a good measurement but I am guessing I need to put the vent 3.5 inches from the front of the belly pan. The last photo is another option for the vent. A posible problem could be the depth of the vent but I don't have a good understanding with aerodynamics and cooling.
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