('14-'18) 20mm Rear Sway Bar - Subaru Forester Owners Forum
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post #1 of 29 (permalink) Old 03-23-2018, 01:52 PM Thread Starter
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20mm Rear Sway Bar

Finally got my Subaru OEM 20mm rear sway bar installed. Had it for over a year and couldn't find time to install it. When I went up to the dealer for my oil change and tire rotate at 18K miles, I asked the tech if he'd put it on for me on the side. He said I'll do it for free...SWEET! Great dealership and the only tech there I'll let work on my Subarus. It's great developing relationships with Service Managers and techs at dealerships

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post #2 of 29 (permalink) Old 03-23-2018, 01:58 PM
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Glad to hear you got it installed....but...in 1 year you couldn't find 30 minutes?

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post #3 of 29 (permalink) Old 03-23-2018, 03:15 PM Thread Starter
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Glad to hear you got it installed....but...in 1 year you couldn't find 30 minutes?
Crazy year...relocated from VA and lived in temp housing for 6 months and then in an apartment with my wife and daughter while our home was being built and started a new job at the same time. Sounds crazy I know but it wasn't a high priority and I had a ton of other things more important to get done. I figured if I can get a young tech to do it for $20 it would be a bargain. He said he'd do it for free but I wanted to give him something to show my appreciation.

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post #4 of 29 (permalink) Old 03-23-2018, 03:59 PM
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why a 20mm one , did you not have an oem one before ?
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post #5 of 29 (permalink) Old 03-23-2018, 04:17 PM Thread Starter
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why a 20mm one , did you not have an oem one before ?
The Subaru's normally come standard with a 16mm bar. Most folks will tell you that going with an OEM 19 or 20 will make a nice difference and make the car handle better. Did this to my 2015 Legacy and was very impressed. Bought the 20mm for the Forester. If you search Google about Subaru rear sway bars, you will find a lot on the subject. You can buy the bar with new bushings for under $100 shipped to your door. They take about 30 minutes to install in your driveway...Legacy had to put up on ramps but Forester is high enough that it can easily be done...if you can make the time.

https://subaruonlineparts.com/subaru...mm-p-3919.html

Here is one example but I think you find it for about $85-$90 and a great upgrade for any Forester.
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post #6 of 29 (permalink) Old 03-23-2018, 04:31 PM
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sorry bud got my wires crossed I have 2004 fsti 20mm as standard .
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post #7 of 29 (permalink) Old 03-27-2018, 06:49 PM
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Is the 20mm rear sway bar a big improvement by itself? Or is replacing the end links necessary as well to get the full benefit?
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post #8 of 29 (permalink) Old 03-27-2018, 06:52 PM
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Is the 20mm rear sway bar a big improvement by itself? Or is replacing the end links necessary as well to get the full benefit?
This, and how much of a difference over the stock 16mm?

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post #9 of 29 (permalink) Old 03-27-2018, 08:56 PM
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I did a 20mm rsb a while back. 800 miles at a guess.

It is a noticeable improvement. Stock end links. Spirited driving. Iím very happy.
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post #10 of 29 (permalink) Old 03-28-2018, 02:50 AM
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Is the 20mm rear sway bar a big improvement by itself? Or is replacing the end links necessary as well to get the full benefit?
there is a quite noticeable difference when adding the 20mm, it is well worth the money. You do not have to replace the stock end links unless you plan on doing things like auto-x or something of similar harshness.

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post #11 of 29 (permalink) Old 03-28-2018, 03:31 AM
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I put in a 19mm when I had about 700 miles on the clock. Big, but subtle improvement. It didn't make anything harsher, but makes it feel much steadier on the highway (especially on windy days) and in turns. It doesn't make it act like a WRX, but it is much better than stock. I chose to replace the end links at the same time, because they are rather skinny looking. With more resistance to flexing (19/20mm vs 16mm) the end links would be the weak point in an extreme turn / twist. The stockers are probably fine for 90% of owners, but I knew I'd be working on performance as long as I have the Fozz, so I just did it at the same time.
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post #12 of 29 (permalink) Old 03-28-2018, 03:34 AM
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I put in a 19mm when I had about 700 miles on the clock. Big, but subtle improvement. It didn't make anything harsher, but makes it feel much steadier on the highway (especially on windy days) and in turns. It doesn't make it act like a WRX, but it is much better than stock. I chose to replace the end links at the same time, because they are rather skinny looking. With more resistance to flexing (19/20mm vs 16mm) the end links would be the weak point in an extreme turn / twist. The stockers are probably fine for 90% of owners, but I knew I'd be working on performance as long as I have the Fozz, so I just did it at the same time.
Interesting, which end links did you use and which rear sway bar?

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post #13 of 29 (permalink) Old 03-28-2018, 04:11 AM
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Interesting, which end links did you use and which rear sway bar?
At that time I chose a 19mm Subie RSB and the Perrin Rear end links. I have since gone to a Whiteline 22mm Adj RSB, still on the Perrin links.

*Note- I never found aftermarket end links specific to the Forester (110mm length). The WRX ones everyone gets are 95mm long. Will this affect performance? How much? I had lowered my XT by 25mm so the shorter 95's are actually a little long for my application (85mm would have kept the same geometry), but it has worked fine for me.
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post #14 of 29 (permalink) Old 03-28-2018, 07:15 AM
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At that time I chose a 19mm Subie RSB and the Perrin Rear end links. I have since gone to a Whiteline 22mm Adj RSB, still on the Perrin links.

*Note- I never found aftermarket end links specific to the Forester (110mm length). The WRX ones everyone gets are 95mm long. Will this affect performance? How much? I had lowered my XT by 25mm so the shorter 95's are actually a little long for my application (85mm would have kept the same geometry), but it has worked fine for me.
Ah, research time for me. Thanks for the info.

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post #15 of 29 (permalink) Old 03-28-2018, 07:52 AM
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You can't beat this upgrade for the price, it was very easy to install. I replaced both stock end links as there was quite a bit of play in them.
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