New Triumph Exhaust Tappet Guide Block. Replace your worn out tappet guide block with this new high quality English made part. Imported from England – replaces Triumph part number 70-5861 and E5861. This tappet guide block features the grooves for the exhaust tappet oiling correct for Triumph 350, 500, and 650 twins (Daytona, T100R, Bonneville, T120T, TR6, T90, etc) from 1966-1968. Please refer to your parts catalog for proper fitment.Made in EnglandO.E.M Part number is 70-5861 or E5861