aFe Control 410-301001-N Ford Mustang GT (S550) Lowering Springs 1.5" (38mm) front and 1.25" (31.75mm) rear drop Front springs are linear 190lbs./in while the rears are progressive 550-750 lbs./in. 2 Stage, high luster, tangerine orange powder-coated finish Direct fit application; requires no modifications to the vehicle Does not fit 2015 Mustang L4/V6 (See P/N:410-301002-N)