I know there's been a ton of posts like this, but I cannot find answer after a day of searching.

I have some coil-overs with Eibach springs. The rear springs are 175lbs. I don't know about the front but they have a code 1000.250.0.0450, is that 450lbs?
I will not lower the car. I am not incredibly concerned with launching at the drag strip. I want a good shock that will last a while and will be good for aggressive street driving.

I was thinking about KYB AGX but I don't know if I would ever use the adjustment feature. My other choice is Bilstein HD without doing any revalving.

Price would be about the same because Summit has a special on the KYBs for ~330 shipped.

What do you think?

Thanks!

 

First, your front springs are 450 lbs as you suspected.

I would go for the Bilsteins for no other reason than they will probably last longer.

My $0.02

 

Not to mention that Ground Control's for DeCarbon's will fit on Bilstein's, and they won't over AGX's without buying new coil-over sleeves.......

As for the shocks, your better choice are the HD's. However, remember they are valved for stock springs which are about 33% softer in front and about 34% softer out back. Not really ideal. Revalves would do you significantly better. HD's are nice shocks, but still a touch soft even with stock spring in their damping ability, adding over 30% more spring isn't going to help that situation (though they'd be better than the DeCarbon's by a LONG shot). Remember, shocks are really spring dampers. They damp out energy stored in a compressed spring. More spring = more energy. This gets skimped on a lot, but yet nobody would think of running cheap gas where Super is needed. Nobody would run big heads without a cam to go with it. You'd not want to run 11" wheels with 275 tires on them. Running stiffer springs with soft shocks just doesn't make the most of either part.

 

Thanks for the replies.

Sam, those Bilsteins HD shocks on your site at the Specials section, are they stock or revalved? Link:
http://www.stranoparts.com/show_items_special.php

Thanks!

 

HD's are $329 a set
Revalves are $500
Koni/Bilstein are $600
Koni SA's all around, $734

 

Sam what springs would you recommend with the Koni/Bilstein combination?

 

Koni/Bilstein combo (only a certain rear Bilstein though, and not the 4th gen rear <G>) will handle most of the spring rates that are commonly out there. But there are some kits with stiffer rears that I wouldn't recommend with the Bilstein rears.

If you are around a 150-160 rate in the back at the stiffest, you'll be fine as long as you don't want the option to adjust of course. Once past there in spring rate, I'd really recommend Koni's instead.