Injected intake tube numbers

[chaskuss]

I am trying to track down some Lycoming IO-360 intake tube part numbers. I can not find these numbers in any of my parts catalogs. These are for the "tuned intake" style IO-360 engines. I suspect that they are obsolete numbers.
The part numbers stamped on the tubes are

74631
74632
74633
74634

Can anyone tell me what these fit?

Charlie

[659JR]

Those numbers are the older nubers for the 78741,78742,78743,78744 that fit the IO360 A series front facing sump.

Jesse

[chaskuss]

Jesse,
That is what I had been told. Thank you for verifying that for me.
Charlie

[mahlon_r]

If memory serves me right, I think they use a different seal then the later style pipes. See Lycoming SI 1216.
Good Luck,
Mahlon
"The opinions and information provided in this and all of my posts are hopefully helpful to you. Please use the information provided responsibly and at your own risk."