Whiteline Group 4 Review - - Table of Contents

 

The Perfect Suspension?

Installation photos

Whiteline Group 4 Coilovers - Specs

 Detailed Description of Group 4's

Group 4 VS DMS or STi or KYB or...

Whiteline Group 4 Coilover Likes

 Whiteline Group 4 Coilover Dislikes

The Perfect "universal" suspension?

I've installed this setup on my 2001 2.5RS, my daily driver.... my baby!!! I've had a couple of different suspensions. As you may or may not know, I've driven a multitude of different setups including: STi, TEIN, DMS 40's, Cusco and more  - and have personally owned and daily-driven on more than one suspension.

 

I've been always in search of "that perfect suspension" that can suit my wants, my needs....

 

I want, what a lot of performance minded Subaru owners want, a suspension that can perform, yet is compliant enough to take your grand-mum for a ride to the grocery store if needed.

Does it exist??? hmmmmmmmmmmmmm.......

When I heard of the "new" Whiteline Group 4 coilover kits, I was intrigued!

 

Whiteline Group 4's have a fantastic design and a new approach for performance suspension

Old School suspension train of thought: less bump travel + shorter struts + higher spring rates = competitive tarmac car. 

 

Sure! But the ride is murder on the streets, and 500lb spring rates? Yikes! Who wants that in their daily driver? Not I... but I want the car to BEHAVE as if it had those springs!!

With the Group 4's design - you get plenty of travel, allowing for use of less abrasive/harsh spring rates, but you still achieve the same effect

So I figured I had to try them.... and that's exactly what I've done

Installation Gallery

OE struts installed. Front OE struts 2.5 RS Rear Interior shot w/seat removed, just for those who may be curious

Sti mount vs OE

Sti Group N comparison

Torque down top nut on Rear Strut Assy

Front OE Struts vs Whiteline Coilovers

OE Rear Strut vs Whiteline Rear Strut Assy

Removing Adjuster knob in order to fit top mount

Fronts completely assembled

Assembled Whiteline Rears vs OE Rear

Rears are completely assembled

Each one has a cutout to encompass the brake line

Struts are definitely L and R specific

I've used zip ties for now to secure lines as my aftermarket braided lines do not have mounting brackets or U clips to secure

Supplied hardware/adjusting tools

Kit installed, adjusting height

Front Struts installed, adjusting knob showing

Rear Struts

adjusting knob

 

photo of the suspension fully installed

 

 

Whiteline Specs and My Setup

GC Body Kit Part Number: 1K4004

Strut/Piston Size: 46mm

Strut spec:  Non-inverted mono tube design - Steel body

Spring rates:  280Front 224 Rear

Kit description: Road/Track Spec Coilover kit

Adjustability: 14 varying settings

Current Setting:  3 clicks from full soft front and rear

Ride Height: 3/4" lower Than Factory Height

 

Accompanying Suspension Bits:

Front sway bar: OE 19mm

Rear Sway bar: IPD solid bar 19-23mm adjustable with HD Mounts and HD Endlinks

Strut tops: Sti Group N hardened mounts

Tires: Dunlop Sport5000's  40psi f/r

 

Previous suspension setups

KYB/AGX with H&R Sport Springs

DMS 50mm

Subaru Factory

 

More Information

Whiteline's Home Page

Whiteline's Group 4 Coilover Information Sheet

Whiteline's Installation Instructions for GD

Whiteline's Installation Instructions for GD

 

 Detailed Description of Group 4's

Whiteline has described these struts as designed to have more bump travel than standard struts, yet still maintain 80% of the factory overall bump and extension travel range. This means, I can drive comfortably through the torn-up pot-hole city streets of Seattle at normal city speeds, and not look nor feel like a bobblehead! 

 

Yet... (and this is the good part....) on the weekends, I can make a few, simple damping adjustments and take this same car to a track day or performance event (auto-x etc), corner with precision and ease - and be competitive!

 

This is a new design product from Whiteline.  These are not a rallying coilover, and are not "just" a track car kit - these.... are what I've wanted for Y E A R S !  A nice blend of a USEABLE suspension which can also be a sweetly competitive weekend toy for Auto-x or Track or a good thrashing about the countryside.

Why not use DMS, STi or KYB/AGX's??

I can honestly say that many of the other coilover kits I've driven on are completely over damped, entirely over sprung - which resulted in a hopping feeling - Meaning a skipping-jarring and bouncing down the road.  Inverted struts have the tendency to "jiggle" - for lack of a better word. You will feel some bouncing, jarring feedback  - especially prominent with those kits which feature higher spring rates. Also I should note that inverted coilover designs (such as my 50mm DMS on my race car) will need rebuilding, sometimes as often as once per year - an added expense to your suspension investment.

 

While I use DMS 50mm's for my rally car, I really hated them in my street car.

( To be fair: My DMS were rally-valved  - spring rates of 225front / 180 rear)

The Design is good... but not Great, not Perfect... I want more

 

Day after day of bobble-head like skipping down the road - makes for a horribly uncomfortable ride. I love my DMS off road on my rally car - but they're DESIGNED primarily for off road use, and are not extremely compliant on the street.  The entire design (inverted) leads to less compliancy and more harshness (jiggling again) even on smooth pavement @ highway speeds.

 

Same basic rules of suspension dynamics apply as well to any inverted design... such as the STi or KYB/AGX struts.  While fairly smooth at higher speeds, I've found these strut/spring combo's to be completely lacking at regular street / city speeds - especially here in Seattle, which is pothole heaven!!  Thus the need for that performance suspension to be compliable at low speeds on rough terrain.

 

The most frustrating thing about the short stroke inverted design (strut / spring) is full compression.

Imagine being on the track, or on the street: mid corner, cornering HARD, outside suspension/wheels are fully loaded with the weight of the car when... BAM! there's a bump....!  With a short-stroke inverted suspension, the car will be completely unsettled, bumped OFF of that bump - as there is no further travel left. Arrgghh!

 

After trying a few different suspensions, I put the stock Subaru 2.5RS suspension back in place, and waited patiently for something to come along that would suit MY wants, MY needs.... and  24mos later, here we are!

 

**many thanks to my pal Mike for helping me get these suckers installed!!!**


Jamie's Likes

  • Adjusters are located on the TOP of the struts, no more climbing under the car

  • No chance of losing / stripping the adjusting knob

  • Extended Adjusters in the rear for Sedans - no need to remove the rear seat to adjust!

  • So far, great Customer service! Here in the USA... they've provided the product quickly and answered all of my goofy questions

  • 2 days in, no noise, squeaks, spring noise - (I will keep this updated when/if results change)

  • Performance without compromise!  I have the performance thus far, and no harsh, jarring results! Car rides very smooth, flat, even over some fairly harsh city streets.

Jamie's Dislikes

  • Brake Line clips do not seem to accommodate aftermarket brake lines very well - there's really no secure   method of installing my lines as they're not factory and do not have the factory mounting brackets supplied with them.  For now, I've zip tied them (rally style)