Higher rate rear springs? Where do I find them?

[RagtopE30]

Hello all. I am at a point where I need higher rate rear springs so my car doesn't squat so much when I launch. I am currently running the 2.5" ID, 4.5" length springs with the 650# rate that were part of the GE group buy. I am having a really hard time finding springs with a higher rate that will still allow me to use the collar and sleeve setup. I need to be able to adjust ride height due to wide rear tires and flares.

Thanks ahead of time.

[digger]

GC sell 2.5" no?

[nando]

yeah, you should be able to get them from GC directly. Either on their website or give them a call.

[RagtopE30]

I'll call them thank you. I looked at their website and i didn't see 2.5" ID springs that would work. As a matter of fact they have the least amount of information of all the suspension sites I looked at.

[DRTSRFR]

GC will not have a 4" 2.50"ID spring in the conventional ERS line. Eibach doesn't make one.

They will have, or can source, a 4" 2.50"ID available in the "elite" series of racing springs.

http://eibach.com/america/en/eibach-news/elite-series-es

[goarmy]

Can go wrong with Vorshlag

http://www.vorshlag.com/product_info.php?products_id=184

[89325iturbo]

Id look for hyperco. I ran 4" before and can get them usually in pretty high rates. Can't remember what dealer I got them through.