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      06-24-2012, 09:08 AM   #1
EuroTunerz5
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Alufelgen SF-71 Lowering Advice Please

Hey guys I have been searching and searching for a week or so with no luck finding what I am looking for.... I need the experts to chime in!!

SF-71 19x8 et45 19x9 et48

Tires are Hankook V12 225/35/19 and 265/30/19

Presently on stock m-sport suspension and my 135 is a 2012!!

What lowering springs will work without rub, give me equal or better ride quality, and not break the bank!

I am considering getting some Koni/spring combo for ride quality reasons.

Looking for good and bad reviews of the springs and who likes this vs that!

Thank you everyone!!
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      06-24-2012, 09:08 AM   #2
EuroTunerz5
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BTW I know everyone likes coilovers here but I don't want coils I want a spring combo... Thank you!
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      06-24-2012, 09:14 AM   #3
EuroTunerz5
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Btw I'm considering the eibach pro system strut spring combo.... Any thoughts?
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      06-24-2012, 02:16 PM   #4
nnguyen04
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koni + ebaich is what most people do.

i have h&r supersport gonna do koni with them
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      06-24-2012, 03:12 PM   #5
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If you lower the rear at all with that tire combo you will rub.
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      06-24-2012, 06:15 PM   #6
EuroTunerz5
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You sure? I may just stay on stock springs but koni fsd struts.... Does that help at all or BMWP springs?
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      06-24-2012, 08:52 PM   #7
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I have BMW performance suspension and was rubbing pretty badly in the back with 255 Michelins.

Nearly gone after guard roll.
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      06-24-2012, 09:38 PM   #8
KennyPowers
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Lowering springs will make your ride worse.

BMW performance suspension likely will be similar in ride comfort bc they only drop the car 10mm from stock.
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      06-25-2012, 06:03 AM   #9
EuroTunerz5
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Quote:
Originally Posted by Nugget
I have BMW performance suspension and was rubbing pretty badly in the back with 255 Michelins.

Nearly gone after guard roll.
I will say the michelins run huge compared to the hankooks and I have seen guys with 255's run and others with Hankook 265's not rub.... Strange huh?
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      06-25-2012, 06:04 AM   #10
EuroTunerz5
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Some say running the 2011 m sport springs with koni fsd is a great combo because supposedly the 2011 oem springs are linear not progressive. Can anyone confirm?
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      06-25-2012, 07:32 AM   #11
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Quote:
Originally Posted by EuroTunerz5 View Post
Some say running the 2011 m sport springs with koni fsd is a great combo because supposedly the 2011 oem springs are linear not progressive. Can anyone confirm?
Looks like your car is a 2012 with M Sport springs. BMW did switch from progressive to linear springs (at least in the rear) beginning with the 2011 model year. My car is a 2009 that came with M Sport springs. About six months ago I installed Koni Sport adjustable dampers and a set of 2011 M Sport springs that I picked up from another forum member on my car. I also have Alufelgen SF-71 wheels and Hankook Ventus V12 tires, although I'm running 255s in the rear rather than 265s. I've had the wheel/tire combo on the car for approximately a year.

Prior to the suspension upgrades I was experiencing some minor rubbing in the rear with more than one person in the car, especially going over dips in the road or at bridges. Since the installation of the 2011 springs and the Konis I have very little bounce in the rear of the car and no rubbing issues. Unfortunately I can't tell you how much difference is due to just the dampers, but all I can say is that my car now drives like it should have from the factory with no real sacrifice in ride.

In my opinion if you already have 2011-12 M Sport springs Koni Sports are a good option for upgrading your suspension without lowering the car, especially if you are going to run SF-71 wheels. I like the adjustability of the Koni Sports over the FSDs. Also even at stock ride height the 19" SF-71 wheels give the car a nice stance.
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      06-25-2012, 07:44 AM   #12
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Here is a link to the write up I did when I changed my suspension set up to the Koni Sports and 2011 M Sport springs. http://www.1addicts.com/forums/showt...ght=Suspension
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      06-25-2012, 08:13 PM   #13
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Quote:
Originally Posted by EuroTunerz5 View Post
I will say the michelins run huge compared to the hankooks and I have seen guys with 255's run and others with Hankook 265's not rub.... Strange huh?
Yeah they are pretty fat.
I've seen 265 Continentals on the same rim and they looked stretched in comparison.
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