| Also known as | E9510, WW26228 |
| Diagram | Fig. 4 — CYLINDER HEAD AND ROCKER BOXES · ref 2 |
| Subsystem | engine top |
| Listed in parts books | 1969–1974 |
Exhaust pipe adaptor
Steel exhaust pipe adaptor/spigot that threads into the cylinder head exhaust port, PN 70-9510, supersedes 70-2961.
This is the exhaust pipe adaptor, also called an exhaust spigot or stub, that threads into the cylinder head exhaust port. It's the piece the header pipe actually clamps or seats against, so it takes the wear and heat cycling instead of the head casting itself. In our records it appears in the cylinder block and head figures for the T90, T100S, T100C, and T100R.
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The part number 70-9510 replaced the earlier 70-2961 for the same physical piece, so if your parts book or an old invoice shows 70-2961, that's this adaptor under its previous factory number. You may also see it listed as E9510 or WW26228, which are the same part under different catalog forms.
These wear from repeated heating and cooling and from head removal, so if the threads in your head are worn or buggered up it's worth checking this piece before you blame the head casting. Confirm which exhaust port size and thread your head uses before ordering, since our catalog entry doesn't spell out the thread spec for this listing.
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