Shop › STAR ROAD S31Z High Quality Wheel Cylinder Image 1 of 1 STAR ROAD S31Z High Quality Wheel Cylinder A$135.00 A high quality wheel cylinder for drum brake setups. Made specifically for the 1977/1978 S31Z. Quantity: Add To Cart Added! A high quality wheel cylinder for drum brake setups. Made specifically for the 1977/1978 S31Z. You Might Also Like STAR ROAD 4-pot caliper kit (forged) for Hakosuka, Kenmeri, S30, S31 from A$2,499.00