Install M3 E46 anti roll bars?

[Limonge]

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.

 

[MACK]

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.

 

[Mr Tidy]

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)!

https://www.pistonheads.com/gassing/topic.asp?h=0&f=72&t=1536365

 

[Machine monkey]

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]

^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.

 

[Limonge]

So rear M3 bar is a no go, right?

 

[Limonge]

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

^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)

 

[Davz]

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