Superflex Front Anti Roll Bar Mounting Kit of 2 Bushes **please measure bar diameter, 14mm (9/16") Basic Models, replaces OEM# AHH6541, 16mm (5/8") MGB GT, replaces OEM# IB 4526, 17.5mm (11/16") Heavy Duty, replaces OEM# AHH7921, 19mm (3/4") MGB, Heavy Duty, replaces OEM# AHH7927, 22mm (7/8") Heavy Duty, 25mm Heavy Duty Aftermarket Bar