How to measure SSIs to determine diameter?

[spsfiend]

Hey folks,

I spent some time using the search tool and did not yield the results i was looking for. Could someone tell me where one can measure SSIs to determine what diamter headers they are / whether to measure the inside or outside diameter?

Greatly appreciated.

[Bill Verburg]

Originally Posted by spsfiend

Hey folks,

I spent some time using the search tool and did not yield the results i was looking for. Could someone tell me where one can measure SSIs to determine what diamter headers they are / whether to measure the inside or outside diameter?

Greatly appreciated.

the primaries are 1 1/2" OD(38mm), 1 3/8"ID(35mm)
the collectors are 2" OD(51mm), 1 7/8" ID(42mm)

[spsfiend]

Thanks Bill! Much appreciated.

[911pcars]

Careful. I've noticed some header retailers describe the tube size but don't indicate whether it's an ID or OD measurement. Makes a difference.

Sherwood