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Old 05-17-2011, 04:23 PM   #1
wrxstijdm
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Default Exedy KSB03?

Guys,

Based on another thread I previously opened, seems like I would need to pull out my transmission.

I will replace the clutch, so I'm wondering:

1-) Is Exedy KSB03 Clutch Kit the OEM replacement that will fit (bolt on) to my car?

2-) I take my car twice a year to a track day and use it gently only on weekends, so I believe that replacing my clutch with a Exedy Stage 1 is a waste of money, plus can damage my transmission? What do you think? Or do you think I should "upgrade" to S1?

3-) Any other brand you recommend? Or is Exedy one of the best?

4-) Is taking the flywheel to the machine recommended? Or do I need to buy a new one? If a take it to the machine, would I have problems soon again with my clutch?

Thanks in advance for your responses!
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Old 05-17-2011, 07:29 PM   #2
darkcrave
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1: Yes
2: Will hold up Fine
3: Exedy is good bang for buck: check ebay for good prices
4:Yes machine it ( i do not recomend the light weight flywheels )
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Old 05-24-2011, 03:12 PM   #3
elislider
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depends on your budget. the KSB03 is the Exedy OEM replacement for a WRX, which is fine to 300hp i'd imagine, and would work fine with your car. if you have more cash, get a stage 1 or stage 2 kit, and/or get a lightened flywheel if you can afford it. just up to you and what you want
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Old 05-24-2011, 04:43 PM   #4
kimokalihi
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Quote:
Originally Posted by darkcrave View Post
1: Yes
2: Will hold up Fine
3: Exedy is good bang for buck: check ebay for good prices
4:Yes machine it ( i do not recomend the light weight flywheels )
Why don't you recommend light weight fly wheels? They make double clutching quicker and easier. I love mine. Only thing I wouldn't recommend it for is if you daily drive your car in heavy traffic where you'll be using the clutch a lot because you will kill it in traffic from time to time and it's more of a pain in the ass but if you really are in traffic that much I would recommend 4EAT instead anyway.
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Old 05-25-2011, 12:00 AM   #5
raceready68
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Lightened fly wheels on turbo cars create less load which cause more lag.
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Old 06-10-2011, 11:11 PM   #6
darkcrave
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Makes the clutch touchy, much harder to launch, makes a bit of noise.
I wouldent use it unless you were autoXing it. I put the exedy light weight flywheel in and i really wish i didnt.
the only reason why i put it in was because my flywheel was toast and i got the exedy for 20$ brand new.
figured why now. but i will be removing it when i get the chance

Quote:
Originally Posted by kimokalihi View Post
Why don't you recommend light weight fly wheels? They make double clutching quicker and easier. I love mine. Only thing I wouldn't recommend it for is if you daily drive your car in heavy traffic where you'll be using the clutch a lot because you will kill it in traffic from time to time and it's more of a pain in the ass but if you really are in traffic that much I would recommend 4EAT instead anyway.
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Old 06-11-2011, 07:40 AM   #7
Jaxx
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Quote:
Originally Posted by raceready68 View Post
Lightened fly wheels on turbo cars create less load which cause more lag.
what .. no
maybe in neutral
but just no

Quote:
Originally Posted by darkcrave View Post
Makes the clutch touchy, much harder to launch, makes a bit of noise.
also no
is this give bad information day or what?

if you can afford it get the light flywheel

the only reason they have gotten a bad name in subarus is they cause misfire codes in the 02+ecus

i am running a 12lb in my ej20k+ an under drive pulley

i am also running the stock 02-05 clutch with out issue .. there is no reason to buy the stage 1 till you have a 2.5 block even then its cheaper to replace a clutch than the transmission

Last edited by Jaxx; 06-11-2011 at 07:46 AM.
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Old 06-11-2011, 01:17 PM   #8
69subaru360
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The lightened flywheels absolutely suck if you ever plan to drag race the car or care about how it launches from a dead stop for autcross/rallycross.

I tried one in my old wrx, it was so bad I was launching the car at 6500 and it still was falling on it face and bogging. I had the trans back out the next day and put the stock flywheel back in and it was back to it's normal self launch at 5500 and 1.7 60' time.

The car I have now has the stock replacement exedy clutch. It makes 279/288. I've never had any problems with it slipping during normal driving or at the track. A few weeks ago on the dyno I could smell it on one pull and that pull had a big dip in the power. Might have been a bad dyno operator though.
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Old 06-12-2011, 11:17 PM   #9
blkgm8
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Okay... Gc8 chassis i presume based on your sig 1998 V4 STI, with ej20k? Do you have mods... you are knocking on the door of the limit of the oem exedy already. Do you plan on doing any more upgrades? You would be in the low 300s with just bolt ons... something to consider while you have the chance to get something stronger.
That oem exedy "will" be perfect for someone with say a "2002" wrx pushing the 225hp stock motor and some bolt ons.

I absolutely wasted an oem exedy in my ej20g with bolt ons and tune. I believe it was the torque. Anyway I am now with spec stg 3 and loving it. Had it in for over a year and no problems whatsoever and holds all the power.

Also... I am going with suggesting the lighter flywheel. I have not had experience with one in my Suby as of yet, but in several other turbo cars I have owned it was a definite improvement and actually helped me spool quicker due to the engine revving more freely.
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Old 07-01-2011, 07:17 AM   #10
tuellma
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great thread. have a 1997 Version IV STi and have been trying to get info on clutch options. anyone have a recommended vendor that they used?

Will definitely need something that can handle more than 300hp. Stock STi is close to 300 already. Looking at a power FC, boost controller and a light tuning. Don't want to break the tranny but need to resolve a few boost issues.

Thanks!!!
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Old 07-01-2011, 12:15 PM   #11
cmyles
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Same dilemma here , I was looking at the KSB03, and wondering if it would hold the power okay . It's cheap and seems decent, I just don't wanna end up paying 800 for a clutch/pressureplate when all is said and done .
Any reccomendations?
Ej20g , ebc , exhaust , intake, td05
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Old 07-01-2011, 02:22 PM   #12
69subaru360
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Quote:
Originally Posted by 69subaru360 View Post
The car I have now has the stock replacement exedy clutch. It makes 279/288. I've never had any problems with it slipping during normal driving or at the track. A few weeks ago on the dyno I could smell it on one pull and that pull had a big dip in the power. Might have been a bad dyno operator though.
Update on this. Normal driving is completely fine. If I blast through 4 gears shifting at redline it's fine. If I try to make a pull on the highway in 4th and start off at too low of an rpm, as it gets into boost it slips the clutch some. Similar to what it did on one dyno pull. I think I'm right at the limit of it. I might upgrade, not sure yet.
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Old 07-01-2011, 04:30 PM   #13
cmyles
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I'm thinking about going with the Exedy stage one organic, not overly priced and decent performance.
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Old 07-01-2011, 05:53 PM   #14
wrxstijdm
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Update on this post: I already replaced my clutch with KSB03 Exedy kit... It feels great (althought I've only drove it around 5 miles LOL).

Only complain is it has a low squeaking noise (similar to the one produced by a loosen belt, but not that loud) when I start my car in first gear or reverse and the clutch begins to "grab". I guess it's a normal sound coming from the normal break in process between the resurfaced flywheel and the new clutch disc? As I said before, car has only 5 miles with the new clutch, so I guess it is a little premature to complain, but just wondering if it's normal?
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Old 07-01-2011, 06:24 PM   #15
darkcrave
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You didnt resurface the flywheel?

Last edited by darkcrave; 07-01-2011 at 08:33 PM.
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Old 07-01-2011, 08:47 PM   #16
cmyles
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Quote:
Originally Posted by wrxstijdm View Post
Update on this post: I already replaced my clutch with KSB03 Exedy kit... It feels great (althought I've only drove it around 5 miles LOL).

Only complain is it has a low squeaking noise (similar to the one produced by a loosen belt, but not that loud) when I start my car in first gear or reverse and the clutch begins to "grab". I guess it's a normal sound coming from the normal break in process between the resurfaced flywheel and the new clutch disc? As I said before, car has only 5 miles with the new clutch, so I guess it is a little premature to complain, but just wondering if it's normal?
Hmm, i just don't want to have something slip on me.
I may pay the extra 300bucks and go with the Stage One Organic, or even the ACT HD One.

And yes, the Exedy clutches are notorious for either a squeaking, or grinding noises.
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Old 07-02-2011, 12:20 PM   #17
wrxstijdm
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Quote:
Originally Posted by darkcrave View Post
You didnt resurface the flywheel?
I did resurface the flywheel

Quote:
Originally Posted by wrxstijdm
....normal break in process between theresurfaced flywheel and the new clutch disc?...
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Old 07-02-2011, 05:15 PM   #18
cmyles
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Ordered mine today, cost me 239.99 all in all, should be here Monday.
If its crap, whatever its only 240 bucks.
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Old 07-04-2011, 06:54 PM   #19
wrxstijdm
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Quote:
Originally Posted by wrxstijdm View Post
Update on this post: I already replaced my clutch with KSB03 Exedy kit... It feels great (althought I've only drove it around 5 miles LOL).

Only complain is it has a low squeaking noise (similar to the one produced by a loosen belt, but not that loud) when I start my car in first gear or reverse and the clutch begins to "grab". I guess it's a normal sound coming from the normal break in process between the resurfaced flywheel and the new clutch disc? As I said before, car has only 5 miles with the new clutch, so I guess it is a little premature to complain, but just wondering if it's normal?

Any ideas? Car has now 100 miles and sound continues to be the same...
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Old 07-04-2011, 09:46 PM   #20
wrxstijdm
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I found a video of the exact same sound (on a different car though):


Some comments in the video state the clutch is glazed... Would that be because it is brand new and flywheel has been resurfaced? Is it just a matter of driving it some more miles?
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Old 07-05-2011, 05:22 PM   #21
wrxstijdm
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Any help?
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Old 07-05-2011, 06:01 PM   #22
cmyles
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Quote:
Originally Posted by wrxstijdm View Post
Any help?
I just got my flywheel resurfaced and the clutch ready to go on so ill let you know.
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Old 07-06-2011, 11:37 AM   #23
wrxstijdm
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Looks exactly the same as mine Let me know how it goes
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Old 07-09-2011, 12:53 PM   #24
turboaddiction
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i just finished my auto to 5-speed swap and used one of these clutches in my car its quite and feels great my current setup is a sti ej20k and 4.444 non dccd sti 5speed
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Old 07-09-2011, 06:23 PM   #25
cmyles
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had a chance to drive around with it in now, feels amazing! Basically the same as stock, little bit stiffer pedal, engagement point is nice and tight. I love it
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