We had a Neon SRT4 owner who races his SRT4 at the track a lot (dedicated track car) and he wanted custom spring rates for his SRT4.
He had previous experience with a high rate spring and wanted to order up a set of inverted BC coilovers but with 600 ft lb springs (factory spring rate is about 220-250!!).
So, we got it all lined up, and are shipping them directly to the race track for the customer. Custom spring rates are no problem for us, just give us a call to discuss!