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Old 11-30-2018, 10:57 PM   #26
cknowlen
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Old 12-01-2018, 11:40 AM   #27
redrexmeister
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Thanks, I completed the install. The ride is definitely improved. Not a lot but enough to notice. The ride height is about 1/3" lower.

So I have about 2.5 finger gap for the fronts and 2 finger gap in the rear. Imho, it's a worthy upgrade for $150.
What do you think guys?
https://i.imgur.com/IDPrNqB.jpg
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Old 12-04-2018, 08:30 AM   #28
cknowlen
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Nicely done. I prefer this setup over coilovers all day long. Maybe I am just getting old and my old man spine can't handle the harsh ride of coils anymore haha. I have had the suspension on for about a year and a half now, including last winter which was pretty bad. Still very pleased. With the 2015+ RCE Black springs the ride height is perfect for my liking, but does not rub at all (even with my 18x9.5 +38 Rays 57cr's).
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Old 12-05-2018, 09:27 PM   #29
redrexmeister
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Quote:
Originally Posted by cknowlen View Post
Nicely done. I prefer this setup over coilovers all day long. Maybe I am just getting old and my old man spine can't handle the harsh ride of coils anymore haha. I have had the suspension on for about a year and a half now, including last winter which was pretty bad. Still very pleased. With the 2015+ RCE Black springs the ride height is perfect for my liking, but does not rub at all (even with my 18x9.5 +38 Rays 57cr's).
Exactly my reasons to go with this set up, and I am an old dude too.

I am completely satisfied with this set up at least for now, but will be willing to try RCE blacks if I get a used set for a reasonable price.

I just got the set aligned. Some of the values are slightly out of range. Would that be a concern?

https://i.imgur.com/qpqKjZ7.jpg
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Old 12-07-2018, 03:31 PM   #30
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Not anything really bad tbh. Your Toe measurements are what matter most. And total toe looks good, rear is a bit out of spec but I don't remember if its adjustable unless you upgrade your LCAs.
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Old 12-08-2018, 01:09 AM   #31
redrexmeister
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Thanks for review of the specs. I will look into rears, it seems like right rear spring is slightly off center, i.e. the lowest coil perch is somewhat shifted to the side. Will try to move towards the center after removing the load from that corner.

Other than that I switched my tires to Nokian zLine, with the new tires, suspension and alignment the ride is pretty great
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Old 01-15-2019, 12:38 AM   #32
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Has anyone try this setup with rce yellow?
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Old 01-15-2019, 05:48 PM   #33
LL25t
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Quote:
Originally Posted by greddysw20 View Post
Has anyone try this setup with rce yellow?
Yellows would be a lot. I would do the blacks

Last edited by LL25t; 01-15-2019 at 05:53 PM.
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Old 02-04-2019, 01:21 AM   #34
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Just did this swap with Rce yellows since I found a good deal on the springs. Picture for reference. Blacks offer 10mm lower drop vs yellow which is 20mm. This setup rides really, really well.

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Old 02-06-2019, 07:09 PM   #35
redrexmeister
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Very nice. What is the wheel well gap in the front and back? Looks pretty even from the picture. Less than two fingers?
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Old 02-19-2019, 01:15 AM   #36
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Yeah 1 finger gap in the front does not rub. I am running a 10 mm spacer up front and 15mm spacer I’m back
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Old 02-28-2019, 04:55 AM   #37
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Anyone know if the 15+ WRX struts will fit 11-14 STI? Looking to swap in 15wrx struts with rce yellows
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Old 03-03-2019, 08:21 PM   #38
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It should considering +15wrx can use suspension from 15+ Sti but it’s not mono tube ... why not wait for an Sti set?
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Old 03-15-2019, 12:57 AM   #39
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I thought I saw somewhere in one of these 15+-suspension-on-a-GR threads, either here or on IWSTI, someone mention the Bilstein B6 as a possible option for this swap. I'm curious if anyone's done this, especially on the 08-10s.

Also, seems like the answer is yes, but would the 15+ GTWORX / Bilstein Cup Sport kit work fine on the GRs?
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Old 03-31-2019, 10:01 PM   #40
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Just to follow up on my own question. I found a good deal on a used Bilstein Cup Sport Kit with RCE Yellows for the 15+ and installed them today on my 2010. I also picked up a used set of Whiteline Com-C strut mounts for the front so those went on at the same time. I was running a set of stock 2016 struts / springs before this so I used the front upper spring seats and rear upper mounts from those on the Bilsteins.

No fitment issues at all with the top mounts set for max. caster and max. negative camber. I'll take some center-cap-to-fender measurements and some pictures later. Haven't driven much after the install other than to make sure there weren't any major issues. Still need an alignment too so I can't really comment on the performance yet but I'm glad to find that everything fits fine.

This thread along with this one on IWSTI were really helpful in figuring out what would work.

Last edited by JSTHoffman; 04-03-2019 at 11:27 AM.
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Old 04-08-2019, 09:41 AM   #41
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Quote:
Originally Posted by JSTHoffman View Post

This thread along with this one on IWSTI were really helpful in figuring out what would work.

Just saw this post, sorry for the late reply. I’m glad the thread was helpful for you! I am excited to see pictures and read some feedback on the Combo you went with, as I thought about upgrading even further to that setup as well. I knew everything would fit, so really it was just a question on it the added performance was worth the cost. Keep us informed on your findings !!
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Old 04-15-2019, 12:33 PM   #42
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Quote:
Originally Posted by cknowlen View Post
Just saw this post, sorry for the late reply.
No problem at all. It was pretty obvious that it would fit from all the posts in this thread. The one thing I noticed is that they changed the way the ABS sensor wire mounts to the front struts. Wasn't anything that couldn't be fixed with a zip tie though. Just curious what everyone else did to keep that secure?

Quote:
Originally Posted by cknowlen View Post
I thought about upgrading even further to that setup as well. I knew everything would fit, so really it was just a question on it the added performance was worth the cost.
So I'm really not the best one to compare the performance of the stock 2015+ setup to the Bilsteins because I only had the stock setup for about a week. I was having a lot of trouble finding a used Bilstein kit for the GR and I figured the stock 2015+ would be a cheaper alternative. Then I found a good deal on the 2015+ Bilsteins and swapped them since that's what I was looking for in the first place.

That being said I think the Bilsteins are an improvement for daily driving over stock 2015+, especially at freeway speeds. Any changes in pavement height or even things like road reflectors seemed pretty harsh on the stock setup and are much more subdued with the Bilsteins. The rear end also felt pretty bouncy over speed bumps even at very low speeds and over smaller sudden bumps at 5-10 MPH. I feel like the Bilsteins are a pretty good improvement in that respect. They're still a little bouncy over rough pavement at 15-30 MPH but not so much that it bothers me.

I also did my first autocross event on Saturday and I was very impressed with the way the car handled. Again I don't have a great baseline to compare to since I hadn't driven the car like that on the stock suspension. However, there was very little understeer unless it was induced by my inputs and in a few situations the tail started to step out when I was too heavy on the throttle coming out of a tight corner or when lifting off in some higher speed corners. Overall the car seemed very balanced.

Anyway, that's all seat-of-the-pants based with no hard numbers to back it up. So on to the objective stuff.

I got the car aligned last week and it came out with -2.4 to -2.5 deg. camber front and rear (stock LCAs so no adjustability in the rear) and 0 deg. toe all around. I'd have to go back and ask about caster since it wasn't in the notes. That's with the Whiteline Com-C front strut mounts.

From what I've read anything approaching -2 deg. camber in the rear is excessive for these cars and I was a little concerned that there would still be a lot of understeer but, like I said, the car felt good during autocross and seemed equally happy to oversteer / understeer depending on the situation. I'll still likely be looking into adjustable LCAs, especially if I start to see some inside tire wear in the rear.

As far as height goes, center-cap-to-fender is 13 1/2" front and 13 5/8" rear with the rear circlip on the highest setting (10 mm above middle).

Pictures below: second one is on the stock suspension. It's the best picture I have for comparison.



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Old 04-15-2019, 02:05 PM   #43
cknowlen
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Quote:
Originally Posted by JSTHoffman View Post
No problem at all. It was pretty obvious that it would fit from all the posts in this thread. The one thing I noticed is that they changed the way the ABS sensor wire mounts to the front struts. Wasn't anything that couldn't be fixed with a zip tie though. Just curious what everyone else did to keep that secure?
Zip tie is the route I went as well. I have yet to have any issues with it. Obviously not the cleanest way of installing, but still functional.

Thanks for your review of the Bilstein setup. It sounds like it is working out nicely for you and providing some enjoyed seat-time as well.
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Old 06-07-2019, 11:25 AM   #44
wasabiman619
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Originally Posted by cknowlen View Post
If you want the lower appearance without sacrificing ride quality, and want to improve overall handling...this is the setup for you!
will this work on the hatches as well? In the rear specifically?
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Old 06-28-2019, 10:33 AM   #45
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Yes. It works great. I have 08 STI hatch with 17 STI struts. Perfect fit, improved handling, ride quality and appearance.

Pretty good value for the money.
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Old 04-28-2020, 09:59 AM   #46
BOOSTUP77
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I have a '12 sti hatch,is it better to instead of using 15+ suspension,use the blistering from a 2018 STi RA?I was actually trying to start a new thread but sadly I can't until I have some legit replies.***128540;
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Old 08-01-2020, 08:13 PM   #47
rwense
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So I have the opportunity to pick up a set of 2018 shocks/springs and have 2 questions.

1. Are there any differences between 2015, 16, 17, 18 shocks/springs? I'd assume they are the same but just curious.

2. Has anyone ran RCE yellows with 18x9.5, 265/40s?
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Old 09-16-2020, 11:14 AM   #48
hinkmeister
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from what i have read online, the 18+ suspension is tuned a little bit differently. As SOA made some adjustments while giving a slight facelift to the those years as well. I just picked up a set of 18+ as well and planning on going the RCE blacks route.
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Old 02-23-2021, 12:05 AM   #49
shaggy sr
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I wonder, will +15 WRX lowering springs work on 08+ wrx strut shocks?
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