dont know if your looking to get them installed or do it yourself, but heres some packages we offer if you are interested:

Suspension Techniques Speedtech Competition Lowering Springs - Front Lowering 2.30" Rear Lowering 1.90"
$240 INSTALLED (parts and labor)

SKUNK 2 Performance Lowering Springs - Lowers 2.25" to 2.5" - Set of 4
$280 INSTALLED (parts and labor)