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Old 11-30-2009, 02:05 PM
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so the real questions now are.

Are they better than stock on an 06 GT AT?

Will the pair well with the MS Springs? (I suspect yes)
Old 11-30-2009, 02:07 PM
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^ i dont see why not...try lookin in the "hey look lowering springs" thread, theres a bunch of pics of different setups on the first page
Old 11-30-2009, 04:11 PM
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Originally Posted by dozer
^ i dont see why not...try lookin in the "hey look lowering springs" thread, theres a bunch of pics of different setups on the first page
yes I have to pile through that again. Maybe I'll add more of them to my database which would make this 100% so easy to lookup!
Old 11-30-2009, 04:13 PM
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I got mine on ebay for $412.00 shipped.
Old 11-30-2009, 04:18 PM
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they will be better than stock, and i suspect will be pretty good with the MS springs
Old 11-30-2009, 04:26 PM
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I'd imagine the rebound rate is higher on an aftermarket shock, and it must have better lifetime... But that's only what I'd hope an aftermarket shock would do lol...
Old 12-01-2009, 01:00 PM
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how are these in relation to the 09 R3 bilstiens...? or are they the same?

if they are the same, I read someone saying that they are easily the easiest customizable shocks... meaning when you rebuild them? What are things we can do with the stock bilstiens?
Old 12-01-2009, 07:17 PM
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I think I'm gonna try the MS springs on the stock shocks until I can get some other shocks. It will be a nice learning experience either way. I really need to document this also since the pictures on the current DIY are gone.

I was looking forward to getting these but I am getting furlough sometime Q1 next year and now need to just save money. Unless someone has a used set cheap....

You guys are always so helpful.
Old 12-02-2009, 08:39 PM
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Originally Posted by pcs
how are these in relation to the 09 R3 bilstiens...? or are they the same?

if they are the same, I read someone saying that they are easily the easiest customizable shocks... meaning when you rebuild them? What are things we can do with the stock bilstiens?
They are not the same.

As far as stock damping rates I am completely unaware of how the 09 R3 and aftermarket HD shocks compare. However, the OE R3 Bilsteins are of the crimp-top variety and are not rebuildable/revalvable/etc. The aftermarket Bilstein HD is not a crimp-top (I forget the terminology used for these) and are easily and cheaply revalvable/rebuildable/etc. Bilstein would charge you ~$65 per shock for custom valving and many other shops will charge you similar rates for similar service. FatCatMotorsports is working on, and may even have available, a service to make your Bilstein HD's adjustable.
Old 12-02-2009, 08:49 PM
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Originally Posted by MilesJ
They are not the same.

As far as stock damping rates I am completely unaware of how the 09 R3 and aftermarket HD shocks compare. However, the OE R3 Bilsteins are of the crimp-top variety and are not rebuildable/revalvable/etc. The aftermarket Bilstein HD is not a crimp-top (I forget the terminology used for these) and are easily and cheaply revalvable/rebuildable/etc. Bilstein would charge you ~$65 per shock for custom valving and many other shops will charge you similar rates for similar service. FatCatMotorsports is working on, and may even have available, a service to make your Bilstein HD's adjustable.
Thanks for the info, I checked the Fat Cat site and they do not seem to have service for the RX-8 (and they have a pretty high price, but for a lot of work).

I'd imagine for street use, the base bilstein HD would be more than capable.
Old 12-02-2009, 08:50 PM
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i've heard of people using ohlins external reservoirs with bilstein shocks to make them adjustable, but its supposedly very expensive to do
Old 12-03-2009, 09:45 AM
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Originally Posted by c0ldf1ame
i've heard of people using ohlins external reservoirs with bilstein shocks to make them adjustable, but its supposedly very expensive to do
The big expense is for the canisters, $300-$400 each. Bilstein has their own but really any external resevoir (Ohlins, Moton, Penske, etc) can be used once you add a schrader valve to the shock, (easily and cheaply done during a rebuild or revalve). The problem is this only gives you compression adjustment with no rebound adjustment

FatCat is able to revalve any non-crimp-top Bilstein shock and is currently working on rebound adjustable Bilsteins for the NC Miata and the RX8 (very similar suspension/shock design) but from what I understand they are not complete yet. Once they are done, you could add any of the popular compression canisters and have drop-in double adjustable, monotube Bilstein shocks.

For me I am looking at getting some HD's revalved, adding schrader valves, but leaving them non-adjustable for right now. I want to see what I can do with the car in STX and the less ***** I have to fiddle with the more consistent my setup will be.
Old 12-03-2009, 01:44 PM
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sucks that they're crimp top and not rebuildable, but good to know... thanks
Old 12-03-2009, 07:39 PM
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Below is an email I sent to Bilstein recently when looking for new shocks. I have Tein S-Tech springs. I ended up buying the Konis, as they are designed for use with lowering springs. I think the MS springs are < 1" drop so you should be okay with Bilsteins. That is an awsome price. The best price I could find on Konis was $673. I needed new dust boots on the fronts so that was another $40. I think the Bilsteins come with new dust boots. Don't forget to trim the bump-stops and "pre-load" the fronts.

Q: Does Bilstein offer a "sport" shock for the 2004 Mazda RX-8 that is designed for used with aftermarket lowering springs? All I see listed is "heavy-duty designed for use with the OEM springs". Is there a problem using lowering springs with the heavy-duty shock?

A: Though Bilstein does not make a Sport shock for the RX-8, the HD shocks can be used with springs that lower the car up to about 1.25”.


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Old 12-04-2009, 09:33 AM
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Originally Posted by Low Fly'n 8
Below is an email I sent to Bilstein recently when looking for new shocks. I have Tein S-Tech springs. I ended up buying the Konis, as they are designed for use with lowering springs. I think the MS springs are < 1" drop so you should be okay with Bilsteins. That is an awsome price. The best price I could find on Konis was $673. I needed new dust boots on the fronts so that was another $40. I think the Bilsteins come with new dust boots. Don't forget to trim the bump-stops and "pre-load" the fronts.

Q: Does Bilstein offer a "sport" shock for the 2004 Mazda RX-8 that is designed for used with aftermarket lowering springs? All I see listed is "heavy-duty designed for use with the OEM springs". Is there a problem using lowering springs with the heavy-duty shock?

A: Though Bilstein does not make a Sport shock for the RX-8, the HD shocks can be used with springs that lower the car up to about 1.25”.
ooo, thanks for this info!

btw, what sway bar do you have there?
Old 12-04-2009, 04:46 PM
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They are Racing Beat front and rear with the stock end links.
Old 02-05-2011, 01:17 AM
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Sorry to revive this thread (rather do it than create a new one on the same topic), but will the R3 Bilsteins fit a Series I?
Old 02-05-2011, 10:23 AM
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Originally Posted by c_ls
Sorry to revive this thread (rather do it than create a new one on the same topic), but will the R3 Bilsteins fit a Series I?

They will fit but the rear perch is different so I think a series I would be higher in the rear with them on.
Old 02-05-2011, 03:40 PM
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Originally Posted by 9krpmrx8
They will fit but the rear perch is different so I think a series I would be higher in the rear with them on.
Appreciate the response. How much higher are we talking about? Can a lower spring be substituted in the rear to counter it?
Old 02-07-2011, 09:50 AM
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That information from Bilstein is misleading.

Bilstein DOES make a sport shock for the RX-8. I have them. Bilstein US does not distribute the sport shocks in North America. Bilstein in Europe does.

The sport shock is called the Bilstein B8. In fact the HD's that are available in Canada/US are called Bilstein B6.

I live in Canada, and I imported mine from the UK from an online store called Larkspeed. They ship to North America, so you can get your Bilstein B8 there.

Want more proof? Head on over to Bilstein's headquarter website page in Europe. Don't go the USA one.
Old 02-07-2011, 10:16 AM
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Originally Posted by c_ls
Appreciate the response. How much higher are we talking about? Can a lower spring be substituted in the rear to counter it?

That I am not sure of, I know coil overs can be adjusted to accommodate this but why would you bother? Just buy a set made for a series I RX8.
Old 02-07-2011, 01:43 PM
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Originally Posted by 9krpmrx8
That I am not sure of, I know coil overs can be adjusted to accommodate this but why would you bother? Just buy a set made for a series I RX8.
I have an R3 and just bought PSS9s. I want to sell my stock Bilsteins, but want to be sure that they will work on series I cars before I do. Don't want to sell someone something that won't fit. As far as I can see, there should be minimal issues if paired with the right spring.
Old 02-07-2011, 01:55 PM
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Originally Posted by c_ls
I have an R3 and just bought PSS9s. I want to sell my stock Bilsteins, but want to be sure that they will work on series I cars before I do. Don't want to sell someone something that won't fit. As far as I can see, there should be minimal issues if paired with the right spring.
Like 9k said, it will fit, just will sit higher and have a significant gap. To get springs that would bring it down to about stock height you would need to get lowering springs to be honest. Make sure your potential buyer knows that you wont be able to install the 09 shocks on a <09 and then look to lower the car beyond stock specs.
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