Eibach or Progress?

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Old Mar 30, 2009 | 10:15 AM
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Eibach or Progress?

Does anyone have any experience with Progress springs? I've always gone with Eibach but the Progress is quite a bit cheaper.

I also see that Progress is .2 inches lower in the front and .2 inches higher in the rear. Any ideas to why they would choose to do this?
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Old Mar 30, 2009 | 10:50 AM
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I'm somewhat familiar with their product line. If they're staggering the drop like you listed, it's probably to keep the gap between the tires & fenders the same front & rear.

Conversely, the 1.0/1.0 Eibach as listed almost has a little tuck to the rear and a little gap up front.
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Old Mar 30, 2009 | 11:45 AM
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That's what I was going to say.

Eibachs keep the entire car relatively horizontal. But since the fender designs aren't identical front and rear, the gaps are different. Sounds like Progress was trying to keep that gap the same, even if that means the nose of the car being angled downward more.
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Old Mar 30, 2009 | 12:24 PM
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As large as the overhang is on this thing...I wouldn't want the nose *any* lower than necessary. I lightly scrape every now & then and my springs aren't even on yet.
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Old Mar 30, 2009 | 01:15 PM
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Has Progress posted what their spring rates are yet?
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Old Apr 3, 2009 | 04:54 PM
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Heeltoe has em for 195. The eibach springs do look pretty low in the rear and high in the front. Cutting the drop 0.2 inches might also help a little (20% ?) with camber issues. Anyone have progress springs on? or have any additional thoughts? Reputation of Progress?
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Old Apr 3, 2009 | 05:04 PM
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Also listening about these two.....
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Old Apr 8, 2009 | 01:16 PM
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While we are on the topic, what brand of spring should I go with if I want a slight drop in heigt (say an inch) and as good and smooth a ride as stock ?!

I don't want anything to perform or go on weekend track days, only for the looks and still be confortable.

What would you recommend ?
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Old Apr 8, 2009 | 01:28 PM
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Originally Posted by Dreamert
While we are on the topic, what brand of spring should I go with if I want a slight drop in heigt (say an inch) and as good and smooth a ride as stock ?!

I don't want anything to perform or go on weekend track days, only for the looks and still be confortable.

What would you recommend ?
Def. Eibach
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Old Apr 8, 2009 | 03:22 PM
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Old Apr 8, 2009 | 05:07 PM
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Someone go with the progress!!!
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Old Apr 8, 2009 | 05:39 PM
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should i guinea pig the progress? lol..im not kidding should i? or does someone else want to
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Old Apr 8, 2009 | 06:15 PM
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Please guinea them. I hear eibach, and i know the good reputation, but the gap in the front is bigger than the back. 0.4 inch diff back to front seems like it would be perfect!
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Old Apr 8, 2009 | 06:17 PM
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I don't know for sure, but usually a less expensive spring means that it's a specific rate rather than a progressive rate. (Harsh ride)

If it *is* progressive, then it's likely the materials used are of a lesser quality.

Kinda like the guys/gals that bought Neuspeed springs years ago. They were cheap and dropped the advertised amount....BUT then they kept dropping and dropping over time because the spring steel used was poor quality. When it does that, the alignment settings change too, meaning you're probably prematurely wearing out your tires.

Meh, I've run Eibach Pro-Kits for like...over 20 years and I've never had anything but a good firm ride & no surprises.
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Old Apr 8, 2009 | 06:19 PM
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id like to see an eibach drop with 18" rims.

also do you need to get aftermarket shocks when you're only dropped 1"
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Old Apr 8, 2009 | 06:47 PM
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ef this im jus gonna get the eibachs like i planned lol.
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Old Apr 8, 2009 | 06:56 PM
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From their site:
"The progressively wound springs will lower the car approximately 1.20" in the front and .80" in the rear. This will give the car an aggressive stance and improve the handling by lowering the center of gravity and increasing the spring rates."
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Old Apr 8, 2009 | 06:58 PM
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PSH you should be different rather than going with the norm!

As for the cheaper price because of the cheaper materials isn't always true. Eibach has a good reputation - so they can charge a premium for their brand name because they know people will pay it.
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Old Apr 8, 2009 | 07:18 PM
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I have progress springs and they handle pretty well. I haven't had any issues with them.
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Old Apr 10, 2009 | 10:05 AM
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Originally Posted by 2G Type-S
From their site:
"The progressively wound springs will lower the car approximately 1.20" in the front and .80" in the rear. This will give the car an aggressive stance and improve the handling by lowering the center of gravity and increasing the spring rates."
Progressive is the plan for my street car. =)

Originally Posted by Viper98912
PSH you should be different rather than going with the norm!

As for the cheaper price because of the cheaper materials isn't always true. Eibach has a good reputation - so they can charge a premium for their brand name because they know people will pay it.
They do have a good reputation, and I think it's for good reason. Their materials are top notch and the product is for real street cars.

I'm not one to tell people that they shouldn't play if they don't go big, you know? It's just IMHO, it's not that much difference between known really good stuff and the less expensive stuff. And...I know I won't have to do it twice.

Our cars already have a stance like a cat in heat. Design wise and stock suspension the a$$ end looks higher than the front anyway. Exacerbate that and I would be scraping the nose on every swinging driveway.
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Old Apr 10, 2009 | 12:48 PM
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sounds like eibach might have a saggy looking rear since the gap is different, seems like progress is trying to even out the gap, which is the look you will want.
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Old Apr 10, 2009 | 12:59 PM
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I've always used Eibach in the past but I think in this case I would rather have the front and back look uniform. I'm not big on the tucked in look anyway ecpecially if the front has a gap and the rear does not. With spring sag, correct me if I'm wrong, it looks like progress may end up being a 1.5" front and 1" rear. So at the end of the day I will probably go with progress as well.

The mods list to my car will be finished in no time. All I have left is springs, sway bar, and intake. That's all I ever do to my cars anyhow. The cost to gain ratio for doing anything else is not worth it IMO. Unless of course you go NO2.
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Old Apr 10, 2009 | 01:59 PM
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It's going to look off in one way or another...

Eibach: Car remains level. Rear fender gap less than front fender gap.

Progress: F/R fender gap closer to being the same, car not level.

I think it looks worse when looking from the side of the car it slopes down towards the front rather than perfectly level. I'd rather have a slightly different fender gap than an uneven car.

Look at the following picture with Eibachs installed. IMO the fender gap isn't THAT big a difference. However now look at how parallel the sideskirts are with the ground. Like HeavyDuty said, the car already has the appearance that the rear is higher than the front, esspecially when you look at the chrome window trim and see how much it slants forward. I personally wouldn't want to increase that slope any more than it already is.

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Old Apr 10, 2009 | 02:18 PM
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Originally Posted by DerwoodEE
It's going to look off in one way or another...

Eibach: Car remains level. Rear fender gap less than front fender gap.

Progress: F/R fender gap closer to being the same, car not level.

I think it looks worse when looking from the side of the car it slopes down towards the front rather than perfectly level. I'd rather have a slightly different fender gap than an uneven car.

Look at the following picture with Eibachs installed. IMO the fender gap isn't THAT big a difference. However now look at how parallel the sideskirts are with the ground. Like HeavyDuty said, the car already has the appearance that the rear is higher than the front, esspecially when you look at the chrome window trim and see how much it slants forward. I personally wouldn't want to increase that slope any more than it already is.


I agree, but when you sit in the car, or when the car is driving, the rear tends to drop more than the front. So I believe having the rear a little higher will counter any other situations where the car is moving or loaded.
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Old Apr 10, 2009 | 03:45 PM
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at the end of the day, you can't go wrong with either choice
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Old Apr 10, 2009 | 04:17 PM
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Originally Posted by rondog
I agree, but when you sit in the car, or when the car is driving, the rear tends to drop more than the front. So I believe having the rear a little higher will counter any other situations where the car is moving or loaded.
Only under acceleration. Otherwise the weight of the driver will lower the front (minimal, unless your a major tubby) at a standstill.
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Old Apr 10, 2009 | 04:41 PM
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Originally Posted by HeavyDuty
Progressive is the plan for my street car. =)



They do have a good reputation, and I think it's for good reason. Their materials are top notch and the product is for real street cars.

I'm not one to tell people that they shouldn't play if they don't go big, you know? It's just IMHO, it's not that much difference between known really good stuff and the less expensive stuff. And...I know I won't have to do it twice.

Our cars already have a stance like a cat in heat. Design wise and stock suspension the a$$ end looks higher than the front anyway. Exacerbate that and I would be scraping the nose on every swinging driveway.
Yes, but you're assuming that Progress might not be "as good" as Eibach. Nobody really knows unless they've owned it in the past. Also regarding the front scraping, the differences we're talking about here folks is NOT that big of a difference. If you're going to scrape you're going to scrape, but remember these are very mild drops.

Originally Posted by DerwoodEE
It's going to look off in one way or another...

Eibach: Car remains level. Rear fender gap less than front fender gap.

Progress: F/R fender gap closer to being the same, car not level.

I think it looks worse when looking from the side of the car it slopes down towards the front rather than perfectly level. I'd rather have a slightly different fender gap than an uneven car.

Look at the following picture with Eibachs installed. IMO the fender gap isn't THAT big a difference. However now look at how parallel the sideskirts are with the ground. Like HeavyDuty said, the car already has the appearance that the rear is higher than the front, esspecially when you look at the chrome window trim and see how much it slants forward. I personally wouldn't want to increase that slope any more than it already is.

Having owned a car that had a lower rear suspension than the front, I think the opposite. I'd rather have a car with even fender gap with a slight overall rake. Most of the time when people judge how "low" your car is (including myself, to my own car), the comparison is tire to fender, not ground to underbody (unless you're driving something really really really low. then, you're more astonished at how you're almost hitting asphalt pebbles).

Originally Posted by ttk5
at the end of the day, you can't go wrong with either choice
I think this is probably the best statement in this thread

Originally Posted by DerwoodEE
Only under acceleration. Otherwise the weight of the driver will lower the front (minimal, unless your a major tubby) at a standstill.
Also disagree with this. The front springs are stiffer than the rear, and surprisingly the car will most likely drop evenly, or slightly more in the rear. Like I said, watching my own lowered car. This occurs both with acceleration, and under normal sitting in the car. And I'm a lightweight.
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Old Apr 10, 2009 | 04:51 PM
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(Edit: I was typing when Viper had posted.)

Originally Posted by DerwoodEE
Only under acceleration. Otherwise the weight of the driver will lower the front (minimal, unless your a major tubby) at a standstill.
Hey! I resemble that remark! J/K

Rondog does have a point in that...measure from the center of the wheel to the top of the fenderwell when you have an empty fuel tank, then again after you fill up. The rear will dip & the front will look higher but should measure the same.

It doesn't matter what car we're talking about, the fender is cut higher in the front because those are (predominantly) the steering wheels. There is a greater differential between the F&R on this car, but like mentioned, the design when level is grossly raked to begin with. I'd still rather have an appropriate amount of travel for roads, not a track. Behind visual preference is the fact that a spring that lowers more will be of a higher rate which at best will be uncomfortable, and at worst, override the stuts ability to dampen the oscillations, prematurely wearing the strut.

Get some Koni Yellows (when they're offered) and crank up the rebound rate & they will live, but it'll ride like crap.
Very cool when I was 21, not fun at all with my flabby white a$$ @ 41.
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Old Apr 10, 2009 | 05:42 PM
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Originally Posted by Viper98912
Yes, but you're assuming that Progress might not be "as good" as Eibach. Nobody really knows unless they've owned it in the past.
To each their own. I don't own stock in Eibach, nor do I have an axe to grind with Progress. All I have is over 20 years experience using them and have never had any compromises. Meanwhile, from H&R, Neuspeed, Drop Zone, Tanabe, Intrax, ad nauseum, I haven't had *one* positive experience in the long term. There's no free lunches. Less expensive product is that way for a reason. For all intents and purposes, most springs run around $200-$300/set. It's a fairly straight forward operation & the biggest variable is going to be the raw materials.

Originally Posted by Viper98912
Also regarding the front scraping, the differences we're talking about here folks is NOT that big of a difference. If you're going to scrape you're going to scrape, but remember these are very mild drops.
It looks mild on paper, but when you get your car, I think you'll be surprised how often you scrape on driveways at stock height with just you in the car and 1/2 tank of gas.


Originally Posted by Viper98912
Having owned a car that had a lower rear suspension than the front, I think the opposite. I'd rather have a car with even fender gap with a slight overall rake.
Also, to each their own, but I haven't desired the Funny Car look for many years. The design elements of this car are drastically raked forward when the car is level. Look at the difference between the height of Darren's headlights, taillights and door handles. If it weren't for the fact that the overhang is so tall, this would just be a matter of personal taste. Spend some time in one just driving around normally & I think you'll understand what I'm trying to convey. Conversely, your other car probably wasn't a rake forward design when new.

It's all good, take what one will, leave the rest. It's a personal decision & as long as your expectations are managed properly, everybody's happy.

Last edited by HeavyDuty; Apr 10, 2009 at 05:45 PM.
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Old Apr 10, 2009 | 09:28 PM
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i'll wait til I see pics of one with the Progress springs. But as it stands, as far as looks go, I am perfectly happy with the way mine looks with the Eibachs. I had a set of Progress coilovers on my previous car and they were very well made.. but as someone said already, you really can't go wrong with either.
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Old Apr 14, 2009 | 03:08 PM
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Alright, someone needs to get them. I'm leaning (forward lol ) towards progress with even gaps, but wanna know ride and see pics. Someone help a brotha out!
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Old Apr 14, 2009 | 04:07 PM
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I was going to keep this a secret and surprise everyone, but fellow tsxer's could benefit from this info so I guess ill share. I ordered the progress springs but they wont be here for a few weeks cause they are not yet in stock. Anyone else contemplating between the two, you can wait for my pictures if you'd like....
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Old Apr 14, 2009 | 05:01 PM
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Originally Posted by ttk5
I was going to keep this a secret and surprise everyone, but fellow tsxer's could benefit from this info so I guess ill share. I ordered the progress springs but they wont be here for a few weeks cause they are not yet in stock. Anyone else contemplating between the two, you can wait for my pictures if you'd like....
are you getting 18's or 19's?
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Old Apr 14, 2009 | 05:02 PM
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Old Apr 14, 2009 | 05:33 PM
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Originally Posted by ttk5
I was going to keep this a secret and surprise everyone, but fellow tsxer's could benefit from this info so I guess ill share. I ordered the progress springs but they wont be here for a few weeks cause they are not yet in stock. Anyone else contemplating between the two, you can wait for my pictures if you'd like....
You Guinea piged. Woohoo. Can't wait to see what it looks like.
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Old Apr 15, 2009 | 12:10 AM
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defconskylude: I have absolutely NO idea if these rims are going to fit or not, but they are 19x8 +38

I am a little bit worried because I am for some reason very prone to scratching underneath my front lip (already got 2 huge ones). This is also the first time i've ever put springs on my car so I really need to learn how to drive a lowered car...friends say its just all about the angles. haha

Last edited by ttk5; Apr 15, 2009 at 12:13 AM.
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Old Apr 15, 2009 | 05:12 AM
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You drive at an angle at bumps, not straight on. And you don't park all the way forward in the stall to hit the concrete block, you stop before it.
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Old Apr 15, 2009 | 09:21 AM
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Originally Posted by Viper98912
You drive at an angle at bumps, not straight on. And you don't park all the way forward in the stall to hit the concrete block, you stop before it.
I need a forward facing camera to avoid this. Either that or front-mounted curb feelers. Certain cars I just do it & it pisses me off every time.

Don't even get me started on the Skyline. For some reason I can remember to put the TSX in neutral when I park, but every time I'm in the white car I have to make it a point to remember it because my left hand just doesn't want to cooperate. Sometimes I end up only 1/2 way in the parking spot to avoid the damn concrete stop.
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Old Apr 15, 2009 | 09:37 AM
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I've yet to scrape my front end on anything but I'm pretty agressive with my approach angle. The best way to deal with steep driveways is to 'cross' them and then straighten out. As far as speed bumps go, unless you car is really low there shouldn't be any problems.

Heavy Duty your Skyline is an exception I'm sure. It looks pretty low.
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Old Apr 15, 2009 | 11:59 AM
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When you measure ride height, you're supposed to measure the height at the side jack points... So some of you guys with the Eibach springs should measure there and let us know what it comes out too.

ttk5: it would be awesome if you could do the same with the progress springs when you get them installed.

The suspension geometry is optimized for the body to be flat horizontally when measured at the jack points, that should be the frame of reference, not how the side skirts look.

Yes looks matter and scraping matters, but also from an objective standpoint, its good to know which set of springs provides optimal suspension geometry.
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