anyone do this? notice a difference? is there a how to thread somewhere? thanks

 

You might as well get some steeda sports or ultralites and some koni str.t shocks and struts. The konis are on sale right now as well. The steeda and koni stuff will be 100 times better than stock gt500 parts.

 

Yah I'd be especially wary of the GT500 springs. Those spring rates are designed for a car with very different weight characteristics.

 

Were's the sale please?

 

The sale is from Koni, so any decently sized Koni retailer should be offering the sale prices. Stranoparts and Tire Rack are two places that definitely have them at the sale prices. The Koni sale is good through June 30th. I plan to pick up a set of the Koni yellow sports for my '08 Mustang, I already have them on my '01 Bullitt.