Swift has been know as one of the very best spring manufacturers in the automotive racing world. They've had sport springs available for the 370z for quite sometime, but I haven't seen anyone advertising them so I figured I'd post up some information and 370z forum pricing for you guys.
Specs - Swift Sport Springs Spec-R:
Front - Spring Rate 10.0kg, Drop 1.2in
Rear - Spring Rate 10.5kg, Drop 1.0in
Price:
$319 for the set (Shipping additional)
Availability:
First week of Jan 2011
Found a review by "CFZ" here:
http://www.the370z.com/brakes-suspen...-reviewed.html
Thanks for looking!
Mike