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Old 08-08-2002, 11:05 AM   #1
JoeT
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Default What's the difference between JDM B4 and B4-RSK?

Hi all,

Just wondering if anyone out there knows the difference between the B4 and B4-RSK. Specifically around the suspension components.

I understand that the "B" in B-4 means Biltstein, but I've seen Yellow struts on the regular B-4 and Blue Struts, they both claim to be inverted struts.

Anyone know what the differences are?

Thanks in advance.
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Old 08-08-2002, 11:37 AM   #2
GTBGUY
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JoeT - the B4's do indeed use inverted struts. Depending on build model (B/C/D) there are minor variences. Spring rates on the RSK are a little higher then the normal B4's and thus the dampers are reworked for this. The earlier build dates IIRC have the yellow struts.

hope that helps.
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Old 08-08-2002, 08:46 PM   #3
anotherB4
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They just do that to confuse people

Seriously though, if the yellow ones are Billies, they will be inverted, and have Bilstein markings (I say that because some crook sold some "painted" ones online a while back from a GT B-spec, which was a "pre-Bilstein OE on Subies" car).

I have seen blue ones too, and i believe they are the ones that have gone back to Bilstein for a re-build (in Japan that is done by a company called Ennepetal (sp?) who do racing dampers - and will also refurb the OE Billies to your spec ).

OK - Std B4 RS and B4 S is the NA series (within the RS range are the RS (2.0 AVCS, auto and manual), RS-B (as RS + Bilstein sus, HIDs etc), RS25 (2.5 AVCS, auto only, Bilsteins etc.), and RS30 (mimldly tweaked EZ30 engine, Bilsteins etc.).

Cheers
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Old 08-08-2002, 08:48 PM   #4
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Ooops - and aftermarket Bilsteins are sometimes blue, too.
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Old 08-08-2002, 08:58 PM   #5
monovich
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wow, good info!

-Steve
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Old 08-08-2002, 10:32 PM   #6
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the yellow ones are the "older" Bilstein technology, where as the blue ones are the ennepetal bilstein series, where Ennepetal and Bilstein got together and combined technologies to create a better shock/suspension series.

go to www.ennepetal.com

Gary
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Old 08-08-2002, 10:38 PM   #7
JoeT
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Hi Gary,

Allow me to correct that link for you.

http://www.ennepetal.co.jp

Thanks for all your help... Hope we get that one.
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Old 08-08-2002, 10:42 PM   #8
AKSubie
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Hmmmm........so basically, yellow means Bilstein only, and blue means it's been touched by ennepetal in some form or another? Regardless of new, refurbished or otherwise enhanced.
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Old 08-11-2002, 08:33 PM   #9
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Quote:
I understand that the "B" in B-4 means Biltstein
Not quite....."B" stands for Boxer, "4" means 4 cylinder...
the BG model GT-B wagon & RS-B sedan (as opposed to straight GT & RS) from Japan are the Bilstein equipped babies, while the latest RSK-B4 (model BH?) comes standard with Bilsteins, at least that's the story here in New Zealand...
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Old 08-11-2002, 08:41 PM   #10
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Sorry m8, the BG GT-B and BD RS both get the TT and Bilsteins. There is no such thing as an RSb or RSB or RS-B in the BD - only the BE as mentioned above AFAIK.

And the B4 moniker has lots of us confused, considering there is a B4 RS30 (with the H6)...go figure
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Old 08-11-2002, 08:58 PM   #11
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Doh, Anton, you beat me to it! heheh

But to add a little, I've seen normal BG GT's with the stock bilstein setup so it was probably offered as some sort of sports package for the models other than what was mentioned above. The Bilsteins are also in the BH GT-B too. Oh yeah, and don't forget the Blitzen (BE/BH)...or did that come with an STi setup?

though this is simple speculation, I think the 4 in B4 refers to 4WD.
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Old 08-11-2002, 09:21 PM   #12
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Quote:
Originally posted by anotherB4
And the B4 moniker has lots of us confused, considering there is a B4 RS30 (with the H6)...go figure
That's simple marketing. The B4 name has become so entrenched in the minds of the Japanese (and overseas) enthusiasts that the advertising agency recommended against using something such as B6. The unwashed masses hear B4 and the TT legacy sedan image overcomes their unconsious mind.

Seriously. Name association is a big thing. Logic goes out the window when it comes to selling products.

Paul Hansen
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Old 08-11-2002, 10:33 PM   #13
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Not to throw another wrench into this debate,
esp. w/ all this great info going around, but
since no one mentioned it, I had always thought
the "K" in "RSK" was for compressor or turbo,
is that true or have I been smokin' something??
If not, what is that K for?
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Old 08-11-2002, 11:02 PM   #14
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Quote:
Originally posted by gumball
Not to throw another wrench into this debate,
esp. w/ all this great info going around, but
since no one mentioned it, I had always thought
the "K" in "RSK" was for compressor or turbo,
is that true or have I been smokin' something??
If not, what is that K for?
I believe it was Rally Sport - Kompressor, though I could be wrong. Marketing, again - the previous legacy twin turbo's were just RS.

Paul Hansen
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Old 08-11-2002, 11:40 PM   #15
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Quote:
Originally posted by shirokuma


I believe it was Rally Sport - Kompressor, though I could be wrong. Marketing, again - the previous legacy twin turbo's were just RS.

Paul Hansen
That sounds right...or maybe it could be "kyou" _? For those of you that can't read japanese, its the chinese character for strong, powerful, or strength...you get the point. Just guessing...

Gary

NOTE: the character isn't appearing correctly...at least not on my screen.
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Old 08-12-2002, 11:44 AM   #16
anotherB4
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OK - I did the usual thing, and did some research.

The schpiel says: B4 meanings: the core mechanisms of 4wd road sports cars "Boxer, horizontally opposed engine" and "4 wheel drive" - taking the first letters makes B4. One could read into this "Berlinetta" and "4 door" as well.

That's from Subaru's literature - forgive me if the translation is a bit rough - to much good Aussie Shiraz in my veins this late at night
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Old 08-13-2002, 10:06 PM   #17
SubbyRS
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Quote:
There is no such thing as an RSb or RSB or RS-B in the BD - only the BE as mentioned above AFAIK.
The BD/BG ran from 94-98 right? In that case there's most definitely an RS-B sedan and GT-B wagon, they even have the bilstein badge on the boot-lid or tailgate...bearing in mind these are "New Zealand new" cars (as opposed to used Japanese imports) but still imported fully built up from Japan......another interesting point: the GT-B wagon & RS-B sedan were only available in the "facelift" BD/BG (around '97/98), earlier GT wagons & RS sedans were simply "GT" and "RS".......of course this could be simple marketing but the later "B" badged versions had factory 17" alloys while earlier BD/BG had 16" alloys......
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Old 08-14-2002, 01:19 AM   #18
anotherB4
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Sheesh m8 - I did not say there is no such thing as a BD RS with Bilsteins, there plainly is (and yes, I do know the specs, I almost bought a BD5B, and had a BG5B). The model is not listed as RS-B (in Japan), just as the RS. Sure the tail has a Bilstein badge on it, but again, it is not listed in Japan (where most are sold) as an RS-B in model lists or 2nd hand car sales, only as the RS (often in Car Sensor as RS 280ps for purposes of differentiation).

Why I do not know, and I am not into flame wars. Note I also said AFAIK - to indicate that model naming/lists elsewhere may be different. And sure enough I got one bite from NZ (would expect nothing less) where BD5Bs and Cs are called RSB (or RS-B; which actually makes sense to prevent confusion).

So we are both right, peace.
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Old 08-14-2002, 09:08 PM   #19
SubbyRS
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m8....I don't like "my dad's bigger than your dad" type of arguments and that's certainly NOT what I was trying to do....I just saw your comment about there being no such thing as GT-B & RS-B and thought I'd share the NZ market experience.....whether or not there's any such "official" model from Subaru Japan is irrelevant.......consider yourself "bitten" by a kiwi..
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Old 08-14-2002, 09:31 PM   #20
anotherB4
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Thumbs up

No wuckers SubbyRS.

I've never scrummed with any Kiwis - but the reputation for biting is well known

<just in case I hit a raw nerve, I'll go hide in my bolt hole now >

Keep on enjoying that RS - fine car, in fact my favourite. The BEST handling, fastest on track of all the Legacies (and will be till the B4 STi hits the streets). And it still looks damn smart, too!!

Cheers
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