Putting together a complete resource for suspension for GC and GD model Imprezas. This will grow over time. Read the contents to find what you are looking for. Feel free to post additions or reviews. Make the name of the part bold in your post

Contents:
Parts Diagrams
Part Descriptions
Coilover Guide
Spring Guide
Damper Guide
Sway Bar Guide
Suspension Arms Guide


Parts Diagram:
(Need diagrams GD complete suspension)


Parts Description
ALK (anti lift kit)
Camber Plate
Coilover
Damper/Strut
Lateral Link
Sway Bar
Spring
Trailing Arm



Coilover Guide


BC Racing BR series
Dampening: Monotube, Single adjustbale (30 clicks)
Spring Rates: 8k front, 6k rear
Applications: All
Notes: Includes front camber plate, rear pillowball mount

Buddy Club Racing Spec
Dampening:
Spring rates: F: R:
Applications:
Notes:
Retail:

Cusco-Zero1
Dampening: non adjustable
Spring rates: F: 12K R: 10K
Applications: All
Notes: Includes front camber plate, rear pillowball mount

Cusco-Zero2e
Dampening: Monotube, Single adjustable
Spring rates: F: R:
Applications: All
Notes: Includes front camber plate, rear pillowball mount, Can be electronically controlled with e-con


Cusco-Zero2R
Dampening: Monotube, Single adjustable
Spring rates: F: 12K R: 10K
Applications: All
Notes: Includes front camber plate, rear pillowball mount

Greddy Type-S
Dampening:
Spring rates: F: R:
Applications:
Notes:
Retail:

H&R
Dampening:
Spring rates: F: R:
Applications:
Notes:
Retail:

Helix Coilovers
Dampening: Single 18 clicks
Spring rates: F: 8k R: 6k
Applications:All
Notes: Includes front camber plate, rear pillowball mount
Retail:

HKS Hypermax II
Dampening: Single
Spring rates: F: 8K R: 6K
Applications: All
Notes: Includes front camber plate, rear pillowball mount
Retail

HKS Hypermax RS
Dampening:
Spring rates: F: R:
Applications:
Notes:
Retail:

HSD HS Coilovers
Dampening: Single
Spring Rates: Unknown
Applications:
Notes:
Retail:

JIC FLTA1
Dampening:
Spring rates: F: R:
Applications:
Notes:
Retail:

JIC FLTA2 Coilovers
Dampening: Monotube, Single adjustable
Spring rates: F: 7K R: 5K
Applications: All
Notes: Includes front camber plate, rear pillowball mount
Retail:

JRZ Competition
Dampening: Monotube, Double, Tripple, or Quad ajustable
Spring Rates: Custom
Applications: STI
Notes: External Reservoir , Damper only
Retail:

JRZ RS
Dampening: Twin tube, Double adjustable
Spring Rates: Custom
Applications: STI
Notes: damper only
Retail:

JRZ RS Pro
Dampening: Monotube, Double adjustable
Spring Rates: Custom
Applications: STI
Notes: External Reservoir , Damper only
Retail:

K-Sport GT Pro
Dampening:
Spring rates: F: R:
Applications:
Notes:
Retail:

K-Sport Kontrol Pro
Dampening:
Spring rates: F: R:
Applications:
Notes:
Retail:

K-Sport Rally Spec AR
Dampening:
Spring rates: F: R:
Applications:
Notes:
Retail:

K-Sport Rally Spec GR
Dampening:
Spring rates: F: R:
Applications:
Notes:
Retail:

K-Sport RR
Dampening:
Spring rates: F: R:
Applications:
Notes:
Retail:

KW V1
Dampening: Twin tube, non adjustable
Spring rates: F: R:
Applications:All
Notes:
Retail:

KW V2
Dampening: Twin tube, Single adjustble
Spring rates: F: R:
Applications:All
Notes:
Retail:

KW V3
Dampening: Twin tube, Double adjustable
Spring rates: F: R:
Applications:All
Notes:
Retail:

Moton Clubsport
Dampening: Monotube, Double adjustable
Spring rates: Custom
Applications: All
Notes: External reservoir, damper only
Retail:

Moton Competition
Dampening:
Spring rates: F: R:
Applications:
Notes:
Retail:

Stance GR+
Dampening: Single
Spring rates: F: 8K R: 6K
Applications: All
Notes: Includes front camber plate, rear pillowball mount
Retail:

Tein Flex
Dampening:
Spring rates: F: R:
Applications:
Notes:
Retail:

Tein SS
Dampening:
Spring rates: F: R:
Applications:
Notes:
Retail:

Tein Super Racing
Dampening:
Spring rates: F: R:
Applications:
Notes:
Retail:

Whiteline
Dampening:
Spring rates: F: R:
Applications:
Notes:
Retail:

Zeal Function X
Dampening:
Spring rates: F: R:
Applications:
Notes:
Retail:

Zeal Function Xs
Dampening:
Spring rates: F: R:
Applications:
Notes:
Retail:

Zeal Super Function (type a,b,c,d,e)
Dampening: Monotube, Single or Double adjustable
Sprint Rate: 8k, 6k
Applications: ALL
Notes: Available with external reservoir, includes front camber plate and rear pillowball mount


Spring Guide

Cobb (STI)
Rates F/R:
Drop F/R: 2", 1.5"
Retail:

Eibach Prokit (STI)
Rates:
Drop F/R: 1.2", .8"
Retail:

Eibach Prokit (WRX)
Rates:
Drop F/R:1.3", 1"
Retail:

Espiler ASD
Rates:
Drop:
Retail:

HKS SF5
Rates:
Drop:21mm Fr, 18mm R
Retail:

Progress Sport
Rates:
Drop:
Retail:

Prodrive (STI)
Rates:
Drop: 20mm
Retail:

Racecomp Engineering
Rates:
Drop:
Retail:

Swift
Rates:
Drop:
Retail:

STI Pinks
Rates:
Drop:
Retail:

Tanabe GF210 (STI)
Rates F/R: 4.3K, 4K
Drop F/R: 1.2", 1"
Retail:

Tein H-Tech (04 STI)
Rates F/R: 230lb, 196lb
Drop F/R: 1", .6"
Retail:

Tein H-Tech (04 STI)
Rates F/R: 229lb, 196lb
Drop F/R: 1", .4"
Retail:

Tein S-Tech (04 STI)
Rates F/R: 252lb, 219lb
Drop F/R: 1.6", .9"
Retail:

Tein S-Tech (05+ STI)
Rates F/R: 250lb, 220lb
Drop F/R: 1.73", 1.26"
Retail:

Damper Guide

Bilstein
Damper:
Retail:

KYB AGX
Damper: Single adjustable
Retail:

Koni Sport Shocks
Damper: Single adjustable
Retail:

Ohlin
Damper: Single Adjustable
Retail:


Sway Bar Guide

Cusco
Sizes:

Tribecca
Sizes: 25mm

Whiteline
Sizes:22mm (F/R),24mm(F/R),27mm(F/R)


Suspension Arms/Links Guide

Agency Power
Adjustable Lateral Links - Aluminum/Pillowball

Cusco
Adjustable Trailing arm - Steel/Pillowball
Adjustable Lateral Links - Steel/Pillowball

Nagisa
Front Control Arm - Chromoly/pillowball

Perrin
Adjustable Lateral Links - Aluminum/Pillowball and Bushing

STI (JDM)
Non Adustable Trailing arms - Bushing
Non Adjustable Lateral Links - Bushing

Whiteline
Adjustable Lateral Links - Steel/Bushing



Other Suspension Guide

Beatrush

Cusco
Front strut brace
Rear strut brace
Camber plates, front and rear
Pillowball upper mount, rear

GT-Spec
ALK

Helix
Swaybar enlinks

Kartboy
Swaybar endlinks

Perrin
ALK

Whiteline
ALK
Bump steer kit
Sway bar endlinks
Sway bar mount

 

MOST COMFORTABLE

KYB AGX and Eibach Springs
Dampening: F: 3/4 R: 5/8
Spring rates: Don't know.
16x6.5" wheels (?)
2.5RS (GC) chassis
Use: Comfort
Notes: This set-up was the most comfortable. Car was lowered. Wasn't bouncy or rough at all.


Stock STi
Stock suspension
Use: Stock
Notes: Slightly more comfortable than the Helix coilovers.


BC Racing BR series (Unofficial and reviewed by charlesj)
Dampening: F: 10/30 R: 12/30
8k front, 6k rear
Dual 27mm bars
ALK
17x8 stockers or 18x8.5 track wheels
Whiteline lateral links
-2.75 front, -2.5 rear
Use: Comfort/Street
Notes: Not much stiffer than stock STi, pretty comfortable
Notes from DarkOnion: unofficial entry, but would probably be placed around here somewhere.
Review: https://www.i-club.com/forums/vbartic...e&articleid=10


HSD HS Coilovers
Dampening: Unknown
Spring Rates: Unknown
16x6.5" wheels
Use: Street
Rex chassis
Notes: This is about the same as the Helix coilovers. Definitely stiffer than STi stock set-up, but not as stiff as the AGX with Swift springs.


Helix Coilovers
Dampening: F: 16/18 R: 15/18
Spring rates: F: 8k R: 6k
17"x 8" wheels
235/40/17
Rex chassis
Use: Street
Notes: No body roll at all. Great coilovers for the price. Not too stiff at all. Definitely closer to a street coilover set-up. Not excessively floaty or stiff.
Review: https://www.i-club.com/reviews/showpr...uct/983/cat/14


AGX with Swift Springs
Dampening: F: 3/4 R: 6/8
Spring rates: unknown
16"x7"
GC chassis
Use: Street/Race
Notes: These springs were designed to be both a competitive and street based set-up. They are not as comfortable as the Eibach's above, but are slightly stiffer, if not similar to the Helix coilovers listed above.


JIC FLTA2 Coilovers
Dampening: Forgot (will update)
Spring rates: F: 7K R: 5K
17" wheels
ALK
GC chassis
Use: Street/Race (In the middle)
Notes: Coilovers are not as rough or as stiff as the HKS Hypermax II or the Cusco-Zero2R listed below, but is definitely bouncier. However... the bounciness, even though more frequent, is not as big bounces.
Review: https://www.i-club.com/reviews/showpr...uct/445/cat/14

Stance GR+
Dampening: F: 8/15 R: 6/15
Spring rates: F: 8K R: 6K
17" wheels
215/45/17
GC chassis
Use: Race
Notes: Stance Coilovers would fall somewhere in there. I think they are definitely harsher than the JIC, but are somewhere near the Cusco's, and definitely more tame than the HKS Hypermax II's.
Review: https://www.i-club.com/reviews/showpr...7/limit/recent


Cusco-Zero2R
Dampening: Don't know... yet...
Spring rates: F: 12K R: 10K
17x8.5"
ALK
Bugeye chassis
Use: Race
Notes: Stiff and bouncy, but not as uncomfortable as the HKS Hypermax II. This car set-up does require experience and practice handling the car.
Reviews: https://www.i-club.com/reviews/showpr...uct/102/cat/14


HKS Hypermax II
Dampening: Lowest for F and R
Spring rates: F: 8K R: 6K
18x8"
235/40/18
ALK
Rex chassis
Use: Race
Notes: More sharp feelings on bumps (speed bumps, blinkies, road imperfections) than other coilover set-ups.

MOST STIFF

 

Stance GR+ for Subaru's are Front and Rear Camber Plates. They are inverted struts and are single adjustable (15 clicks).

 

hey darkonion the hot buttons for the links on your post are not working

 

Hmmm... oh well. I'll fix it another time. I think it might be because the updating of the user review section.

 

Question on suspension upgrade.

The handling on my old '98 2,5RS (Eibach springs, KYB_AGX adjustable struts, Mike Shields rear 18mm bar, whiteline down links and hard urethane bushings) was more responsive than in my new WRX ltd. Would similar mods be as effective on the WRX? I'm thinking of a Whiteline adjustable 22mm rear bar. I'm on a bit of a budget. Also, I don't want to mod the suspension to the point that I am happy, but my wife can't/won't drive it. This is my daily driver, my weekend machine is a Lotus Caterham Seven, so I don't have to get too crazy with the mods on the WRX. Any ideas? Thanks in advance. Ed

 

Addendum to above post.

My WRX ltd is an '07. I left that out. I'm new to posting, so I'll probably make more errors as I go up the learning curve. Ed

 

start with sway bars and endlinks. Its not going to make as drastic of a difference as it did on your GC but that's because the sti has a better starting point. But it will make a huge difference.

I'd start there. Then look in to a nice spring. RCE or something like that would get my nod. Crucial if you still want some comfort. To me strut/spring combos are the way to go on a street driven car. Coil Overs are just to gnarly and the main up side of them isn't really gonna get used much by most people... adjustability. Get Koni struts.

 

hey i just put some zeal function xs's on my car anyone have any ideas or opinions on an alignment setup? im not to familiar with aligning

 

ok I was looking at springs today. Do the springs for an 04-05 Wrx fit on the 07 WRX Limited

 

anybody rocking Tein Flex? How do you guys like them?

 

I'd start there. Then look in to a nice spring. RCE or something like that would get my nod. Crucial if you still want some comfort. To me strut/spring combos are the way to go on a street driven car. Coil Overs are just to gnarly and the main up side of them isn't really gonna get used much by most people... adjustability. Get Koni struts.[/QUOTE]

This advice is gold lol I can't believe how many people buy cheap coilovers for "performance". For 99% of these people, their money would be much better spent and quality struts and springs.

 

For the Mainly Daily Driving and occasional Touge/AutoX I am in a bit of a dilemma. Right now I am torn between Koni Yellow and Ground Control or KYB AGX and Ground Control (Cheaper of the two and easier to put together)