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      09-11-2021, 08:10 PM   #1
m3forty775
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Bumpstops needed ?

Recently bought a 2020 m340xi non adaptive suspension and I want to go with H&R springs. Can I cut my stock bumpstops or what are my options ?
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      11-27-2021, 12:05 PM   #2
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I think you can use the Dinan bump stop set but would be curious to hear from anyone that truly knows.
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      11-28-2021, 08:26 PM   #3
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I'm interested in this as well regarding the Dinan bump stops. I have H&R springs but haven't installed them yet. Curious if they would work with them.
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      12-23-2021, 10:03 AM   #4
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I used the Dinan stops with my Cobra suspension and they have been fine. The drop is slightly less than the H&R (may 1/4 inch less with Cobra) but its probably okay. I do know that Dinan has one of the less aggressive drops but their bump stops seem pretty versatile.
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      12-23-2021, 01:45 PM   #5
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Quote:
Originally Posted by m3forty775 View Post
Recently bought a 2020 m340xi non adaptive suspension and I want to go with H&R springs. Can I cut my stock bumpstops or what are my options ?
You can cut your stock bumpstops but if you want to go back to stock springs, it might be a problem. I lowered my previous car on lowering springs and cut the stock bumpstop since that was what was recommended and I had no issues. I turned the car in on the lowering springs so it was all good.
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      12-23-2021, 03:24 PM   #6
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From Dinan, "Bumpstops are carefully tuned for use with Dinan springs."

Might not be a bad idea to contact them and confirm they can be used with H&R.
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      12-29-2021, 02:59 PM   #7
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Quote:
Originally Posted by jpowers36 View Post
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I'm interested in this as well regarding the Dinan bump stops. I have H&R springs but haven't installed them yet. Curious if they would work with them.
I have the H&R springs and the Dinan bump stops on a 2020 M340 xdrive. No issues whatsoever. I would of probably gone with the Dinan springs also, but they still don't offer them for the xDrive.
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      12-29-2021, 05:21 PM   #8
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Quote:
Originally Posted by SJA05 View Post
I have the H&R springs and the Dinan bump stops on a 2020 M340 xdrive. No issues whatsoever. I would of probably gone with the Dinan springs also, but they still don't offer them for the xDrive.

You're awesome, thank you! Did you install both at the same time? Was curious if anyone could attest to the ride quality difference between H&R springs with and without the bumpstops.

It's interesting that Dinan's site lists the product as this, "DINAN SUPPLEMENTAL RIDE QUALITY & HANDLING KIT - 2019-2022 BMW 330I (RWD & XDRIVE) / M340I (RWD) / M440I (XDRIVE)", where it only indicates xDrive for the 330i.
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      12-30-2021, 06:14 PM   #9
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I know, the issue is that Dinan doesn't "support" the M340i xDrive. There's other threads in this subform where they state that they haven't been able to get an M340i xDrive into their shop in order to develop springs. So, since the springs aren't available, I assume they are playing it safe by not listing the bump stops as M340i xDrive compatible.

Yes, I had the bump stops installed at the same time as the springs (I assume it would be cheaper to do it that way).
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      06-04-2022, 05:06 PM   #10
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Quote:
Originally Posted by NoVaRob21 View Post
I used the Dinan stops with my Cobra suspension and they have been fine. The drop is slightly less than the H&R (may 1/4 inch less with Cobra) but its probably okay. I do know that Dinan has one of the less aggressive drops but their bump stops seem pretty versatile.
You have the part number for the bump stops?
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      06-04-2022, 05:09 PM   #11
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Originally Posted by teknic90 View Post
You have the part number for the bump stops?
NM, found them.
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