NOTE: FOR 1/2" SHACKLE BOLTS ONLY. MUSTANGS CAN HAVE 9/16" BOLTS SO CHECK BEFORE ORDERING. This 3 position rear shackle kit is a perfect, economical way to lift the rear of your car for a great looking stance. The kit is adjustable for approximately 1" through 4" lift and is made from heavy gauge steel. It's zinc oxide coating, stainless steel sleeves, rubber bushings and grade 5 bolts are designed to last. A very easy install, most can have them installed within an hour. Rear shock extenders may be needed. Kit includes: (4) shackle plates, (8) Rubber Bushings, (4) 1/2" Stainless Steel Sleeves, (4) Grade 5 Bolts with Lock Nuts and Instructions. Made in USA!