08-Present G8 40MM (1.57") Drop Springs F&R

40 MM DROP-FRONT & REAR When used with  STRUTS with STOCK HEIGHT PLATFORMS. Not recommended for use with stock shocks and struts because of limited travel  or proper bump stop.
20MM Drop when used on cars with FE2 Suspension

 HFL-114SL LOVELLS Front Springs-PAIR 180 lb Fixed Rate Spring 
V6 Ride Height 385 MM          V8 Ride Height 380 MM
 HFL-115 SL LOVELLS Rear Springs-PAIR 350 lb Fixed Rate Spring
Ride Height 370 MM

Ride height measured from center of wheel hub to lip of fender measured from center of wheel hub to lip of fender+-5MM (5mm each way dependant on vehicle accessories and build quality).