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Old 05-31-2012, 01:44 PM   #1
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F & R sway bar size?

On my 2007 SE 5 sp. daily driver are an 18 mm. front and 22 mm. rear sway bar. The aftermarket rear poly bushings have bolt in mounts and are noisy. Weld on mounts and converting the poly bushings to greaseable are next.
The car handles close to neutral but rolls over-leans- more than I like. It's a 4door sedan. I put the shocks and struts from Hilbish on it and that realy improved things in the curves from 70mph and up. Tires are Cooper CS4 195/65R 15 Premium Touring.
What diameter front and rear sway bars do people have good results with on similar Focus? Been thinking about this for awhile but don't know what to do to reduce the lean without destroying the ride quality. Please help. Thanks


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Old 05-31-2012, 07:29 PM   #2
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Your front sway bar should be 21mm and the rear should be 20mm (same as SES). Replacing the front bar is a pain in the butt but you will love the difference in the cars balance. The SVT uses a 21mm rear bar that I am using and that seems fine. You could probably get away with your 22mm rear bar.

The 18mm front is for the SE with no rear bar. I went through the same issue by adding a 20 mm rear bar. The car feels better but if you really push it some nasty things can happen.

Yes the production rear bushings are junk. I used a set of Raybestos links (pn 545-1113) that seem to work well without being overly harsh. The thru bolt is upsized and the bushings are a higher but a reasonable durometer.
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Old 06-06-2012, 11:30 AM   #3
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Thanks for the info. VillageT. I should have been more clear- this car is an SE without a stock rear bar. I bought the 22 mm. aftermarket rear bar used.
I have been thinking about a 22 mm. front and 25 mm rear bar. Has anybody done this and what happened??
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Old 06-06-2012, 01:37 PM   #4
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I have the same suspension, I replaced my front 18mm with a 21mm from an SVT. I have Steeda's 22mm rear sway bar as well. My rear bar is silent, PM and I can give you some pointers on that (welding would be ideal though.)

22mm front and 25mm rear might be a little bit too much for the FRPP springs/shocks you have but I cant say from personal experience. I am satisfied with going from 18mm to 21mm (about 85% stiffer.) Sway bars are more for a fine tuning for your suspension. I'd say pick up a used svt front bar and see how it works before spending more on the 22/25 combo. Search here for a used one, should be less than $100
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Old 06-06-2012, 03:51 PM   #5
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The 2009 Focus has a special suspension option with a 22MM front and rear swaybar. This should work reasonably well with your springs.

If you are worried about rear body roll be very careful. I am told by a suspension engineer that the Focus needs some rear body roll to get the correct camber during cornering.

Again you want to have a balanced system. Both the SVT and the 2009 special handling package were developed with 215/45X17 tire packages, if you want to make improvements that's probably a better option than going apes] with big swaybars.
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