Triumph / BSA Replacement Oil Filter 99-1179 - B25 B50 TR25W - Choose Manufacture Rocket Which means it won't rust

Which means it won't rust

This nut threads on to your high gear to secure your transmission sprocket

Also fits Triumph 350 & 500 unit twins from 1958-1974

We also carry the Early Plunger Housing for 1963-1968 650 Twins

Triumph / BSA Replacement Oil Filter 99-1179 - B25 B50 TR25W - Choose Manufacture Rocket Which means it won't rustKeeping your oil clean and filtered is next to Godliness! Oil is cheap insurance to make you're engine last longer and run stronger. This filter will replace both Triumph and BSA part number 99 1179 and 19 4589. Fits Triumph and BSA "oil in frame" singles (TR25W, B25, B50, etc) from 1971 1973. Filter also works with our Triumph T140 TR7 sump kit. Check your parts book to ensure the best fitment. Use the drop down menu to select which type of oil