how long will new OEM subframe bushings last?

[ptownTSI]

So when i'm done doing all this work to my bmw i'd like to take it to auto-x and some track days. How long will oem subframe bushings last? I thought about those urethane but oem was only like $25 instead of $100 or so for urethane. I will be doing urethane motor mounts, and have new oem trans mounts, also new oem trailing arm bushings. shocks/springs would be vogtland with bilstein sports.

[xLibelle]

OEM - another 18 years

those $100 urethanes will crap in several, depending on the chemical makeup.

[Jand3rson]

OEM bushings will be more than suitable for your application. Urethane bushings are intended for track cars that aren't driven on the street. Everyone just installs them because it's cool and they make your E30 FUH RAZE.

[ptownTSI]

ok well oem it is! its the motor mounts that i want to get in urethane right? Mine are still good but i don't want to chance it.

[euroshark]

Urethane bushings are intended for track cars that aren't driven on the street. Everyone just installs them because it's cool and they make your E30 FUH RAZE.

But E28s, oh boy, thank god for urethane control arm bushings... If it weren't for Grunt's bushings, we'd be raplacing the things every 8 months when the steering wheel started shaking violently while breaking...

[Jand3rson]

ok well oem it is! its the motor mounts that i want to get in urethane right? Mine are still good but i don't want to chance it.

OEM rubber motor mounts will be fine, as well. If you want a little bit of an upgrade, get E12 motor mounts, they're a little bit bigger and more stiff. Bimmerworld sells them listed as "325 ugraded motor mounts", I just got a pair.

[StereoInstaller1]

Yup, yup and more yup. Urethane CABs, upgraded OE motor, tranny and subframe bushings.

Personally, I am doing urethane TA bushings, front and rear sway bar bushings, heim joint endlinkss on the stock "is" bars.

Screw a bunch of noise just for the .001% of the driving time truly hauling ass on a nice smooth corner...with no traffic.

Luke

[Mike325]

I'm going OE on my bushings as well. I don't see the need to get these $100 bushings when 99.9% of the time you will drive your car just like any other street car.

[StereoInstaller1]

Mike, the only thing I would disagree on is the CAB's. They are so much better in urethane.

I worked on TONS of these cars when they were new. M3's and down. Seems like lots of them had brake shudder when brand fucking new, as in under 10 miles.

My shudder went from unbearable, like the wheel trying to jump out of your hands to absolutely smooth with AKG Urethane CABs being the only change.

Luke

[jlevie]

Offset Delrin CAB's are another option. You get a bit more road feel, but they hold up well and do a great job of locating the end of the control arm.