GTV6 and Milano (75) Vented Rotor Spacer Kit. All years. Performatek rear caliper spacer kit allows the use of SZ30 vented rear rotors with standard OEM rear calipers.  Performatek spacers and extended anti-rattle pins are made of stainless steel. O-rings are square section as OEM and made of the appropriate material for hot brake fluid  New long bolts supplied, reuse the original long bolts as the new short bolts.  The kit will service two calipers.