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Install M3 E46 anti roll bars?

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Limonge
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Install M3 E46 anti roll bars?

Post by Limonge » Tue Feb 13, 2018 8:13 pm

Hello,

I'd like to install new anti roll bars on my Z4 2.5si, and I just saw there are some H&R ARB which measure 27mm/21mm. I also saw that some people are talking about installing the M3 E46 H&R ARB, which are 30mm/25mm.

I've been doing some research and I know that the front bar is "plug&play", but the rear one from the M3 does not fit the Z4M. Do you know if the M3 bar will fit a NON M Z4?

Thanks in advance.

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Install M3 E46 anti roll bars?

Post by MACK » Tue Feb 13, 2018 8:19 pm

I'm pretty sure you have that the wrong way round. The rear does fit the M. It's the non M cars it doesn't fit.
If you don't go down the H&R route I think some of the run of the mill e46 models have a bigger rear bar the zeds and they will fit.
Hopefully someone can confirm this one way or another.
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Install M3 E46 anti roll bars?

Post by Mr Tidy » Tue Feb 13, 2018 10:14 pm

My daily is a 325ti, so I've read quite a bit about them too!

I'm sure they have a stiffer rear ARB than any other E46, barring of course the M3 which sadly doesn't seem to be an option. Plus you don't need to find a Sport model as for some reason the 325 Compacts all had Sport suspension and seats, but despite that the SE's still only got 16 inch wheels. :?

If you have some time to spare I'm sure the answer is in here somewhere (they seem quite popular)!

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Install M3 E46 anti roll bars?

Post by Machine monkey » Tue Feb 13, 2018 11:22 pm

Front m3 arbs will fit the z4 I have one. The convertible m3 bars are thicker I believe. You need to buy the m3 bushes but they fit in the carriers.

No rear m arb from a z4 or e46 will fit. I have a H&R rear waiting to go on no idea what size it is butfrom memory it’s about 25mm
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Install M3 E46 anti roll bars?

Post by GuidoK » Tue Feb 13, 2018 11:37 pm

^yes the e46 conv. has a 27mm front swaybar (like the z4m) and the normal m3 has a 26mm one.
The z4m / M3 rear swaybar doesnt fit the normal z4

I've also used the front m3 swaybar and a H&R rear swaybar for the last 5 years now. Its an excellent combination.

Rear H&R swaybar for the z4 is 21mm.
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Install M3 E46 anti roll bars?

Post by Limonge » Wed Feb 14, 2018 10:33 pm

So rear M3 bar is a no go, right?

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Install M3 E46 anti roll bars?

Post by Limonge » Thu Jan 24, 2019 5:10 pm

Machine monkey wrote: Tue Feb 13, 2018 11:22 pm Front m3 arbs will fit the z4 I have one. The convertible m3 bars are thicker I believe. You need to buy the m3 bushes but they fit in the carriers.

No rear m arb from a z4 or e46 will fit. I have a H&R rear waiting to go on no idea what size it is butfrom memory it’s about 25mm
GuidoK wrote: Tue Feb 13, 2018 11:37 pm
^yes the e46 conv. has a 27mm front swaybar (like the z4m) and the normal m3 has a 26mm one.
The z4m / M3 rear swaybar doesnt fit the normal z4

I've also used the front m3 swaybar and a H&R rear swaybar for the last 5 years now. Its an excellent combination.

Rear H&R swaybar for the z4 is 21mm.
Hello guys, I've found a cheap M3 front ARB (coupe, so 26mm). Where can I find the rear H&R bar only? All I've seen is the full set (front and rear)

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Install M3 E46 anti roll bars?

Post by Davz » Sun Feb 17, 2019 5:42 pm

You could use an E46 vert rear sway bar which is 20mm.
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