This is a front upper shock bushing set (4) Triumph TR3, TR4, TR4A, TR250, TR6, GT6 and Spitfire. Or a rear shock link bushing set (4) made in polyurethane for Triumph TR4A IRS, TR250 and TR6. The bushings have graphite impregnated in them for long life so this will be the last set that you have to install. 681-245 HP146