Oil Pressure Relase Valve (Relief)replaces the one with indicator Triumph Pre Unit/Unit 3TA.T21.T90.T100ss.T100c.TR5.T100.T100A.T100R.5T.6T.T110.TRW.T120.T120R.T120TT. TR6R.T140V.TR6V.TR7V. BSA A50.A65.B44.B50 BSA A7/A10 2 holes Made in Englandreplaces these part numbers E3204. GS250. GS251. GS254. GS248. E2795Please look at all pictures