SCAT tubing question

[RickS]

PA28-140, O-320. My carb inlet hose could use replacement, and I'm slightly confused on the size. In the parts catalog, the p/n is 63633-11. Does the -11 refer to the diameter? Measuring the flange behind the air filter, it looks like it should be 3" in diameter, but a -11 hose from Aircraft Spruce is 2.75". Any clarification would help! Also, SCAT or SCEET? The parts catalog just says hose. Which is better for the carb inlet?

 

[bryris]

 

[Ray93J]

 

[shanecoley]

 

[RickS]

 

[kf6iat]

 

[Ericb]

 

[RickS]

 

[Orest @ CYFD]

 

[kshaw]