BSA 441 350 250 Oil Line Manifold X-ring SET b44 b40 b25

Should be suitable for ALL unit 350 and 441 BSA, and B25 through 1970.  OEM part #'s 68-0597 / 70-8259 / 70-8132, depending on your parts book.  X-rings to replace the nearly always leaky o-rings BSA used at the oil pipe junction under the engine.  Doubling the surface sealing area, the rings work really well.  An alternate size also available for unit twin, check the store.