Hi guys,

I'm looking up the current pipe line up and notice that the following pipes are no longer available:
- 2678 (12 engine)
- 2679 (12 engine)
- 2033 (21 engine)

Would anyone know why they were discontinued? Also I see only 1 pipe available for 12 engines now, the 2681. Does anyone know what is it equivalent to (i.e. 2678 vs 2679)..

Thank you