BSA & Triumph Late Unit Singles Replacement Air Filter Element. this Filter has an O.D. that Measures approx 5 5/8", Width Measures approx 2" & the I.D. is 3 1/2. Fits all BSA & Triumph "Oil In Frame" Singles (B25, T25, B50, etc) from 1971-1973. Also fits the Triumph TR5T Twin for the year of 1973. Please refer you yours parts catalog for proper fitment.
•Made in Taiwan
•O.E.M Part number is 60-2601 or D2601