OEM Sway Bar options? - BMW M5 Forum and M6 Forums
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post #1 of 37 Old 8th September 2015, 07:33 AM Thread Starter
beastpilot
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OEM Sway Bar options?

I'm looking to upgrade the sways on my E60 M5.

It appears the best options are the RD Sways, but they are both expensive, and have a somewhat iffy quality reputation.

As far as I can tell, the RD sways offer the following stiffness increases:
Front: +13%, +29%, +45%
Rear: +40%, +68%, +119%

I hear most people run the fronts in the middle and the rears full stiff or middle stiff.

The front M5 sway is 26.5mm and the rear is 18mm. Thus, to hit +29% and +119% would need a 28.25mm front and a 21.9mm rear.

I'm thinking of going with the M6 front bar which is 28mm, and the Dinan rear which is 21mm. This should give me +25% in the front and +85% in the rear. I could go +43% in the front also via the M6 competition package bar.

Anyone tried anything like this?
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post #2 of 37 Old 8th September 2015, 08:00 AM
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I wouldn't mix and match. I would go with something specifically designed for the M5. I like the Dinan option with the rear sway/FRC.

2008 M5 SMG
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post #3 of 37 Old 8th September 2015, 08:58 AM
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Quote:
Originally Posted by drewTT View Post
I wouldn't mix and match. I would go with something specifically designed for the M5. I like the Dinan option with the rear sway/FRC.
I like Dinan's setup, but I wish they made a front bar that was adjustable. Their FRC is not adjustable.

RDsport sway bars seem to be the only option for a fully adjustable setup. I just can't justify spending the money on them when their quality seems to be hit or miss at best.

2006 E60 M5 Silbergrau Metallic/Indianapolis Red
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post #4 of 37 Old 8th September 2015, 09:00 AM
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RD Sways are the only aftermarket sways for our cars that are fully adjustable. And yes, quality is really hit or miss. I have a set of brand new RD Sways if you're interested. PM me.

Dan

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post #5 of 37 Old 8th September 2015, 01:09 PM
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post #6 of 37 Old 8th September 2015, 04:46 PM Thread Starter
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Quote:
Originally Posted by drewTT View Post
I wouldn't mix and match. I would go with something specifically designed for the M5. I like the Dinan option with the rear sway/FRC.
Got it, go with a specifically designed option like the RDSport which allows 9 different settings, or the Dinan which allows 3
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post #7 of 37 Old 8th September 2015, 04:55 PM Thread Starter
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To post my research on what is available OEM:

Front:
26.5mm - E60 M5 Stock - 31352283070
28 mm - E61 / E63 - 31352282790
29 mm - E61 Competition / E64 - 31352283123

Rear:
18 mm - E60 / E63 - 33552283072
19 mm - E61 Competition - 33552283908
20 mm - E61/E64 - 33552283036
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post #8 of 37 Old 8th September 2015, 05:09 PM
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Quote:
Originally Posted by beastpilot View Post
To post my research on what is available OEM:

Front:
26.5mm - E60 M5 Stock - 31352283070
28 mm - E61 / E63 - 31352282790
29 mm - E61 Competition / E64 - 31352283123

Rear:
18 mm - E60 / E63 - 33552283072
19 mm - E61 Competition - 33552283908
20 mm - E61/E64 - 33552283036
Assuming they are all the same material/hardness and have the same wall thickness.
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post #9 of 37 Old 8th September 2015, 05:10 PM Thread Starter
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Quote:
Originally Posted by Mcc420 View Post
I put on e61 front and rears which is the same as a m6 vert.
E61 uses 28/20 while the E64 uses 29/20.
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post #10 of 37 Old 8th September 2015, 07:54 PM Thread Starter
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Quote:
Originally Posted by Bucky View Post
Assuming they are all the same material/hardness and have the same wall thickness.
All of the BMW bars are solid, and it's hard to imagine they vary the material usage across these bars when the diameters make perfect sense in going up in size for heavier or or more aggressively targeted cars.
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