Quote:
Originally Posted by LightNFast
It’s a rough casting but here you go for what it’s worth:
Blue Thunder “Cobra” 289 IDA.
Micrometer reads:
Dia. = 1.27 without bead
Inside distance (between tubes) = 3.89
On center = 5.16
So this coincides with *13* … 1-1/4" dia. and 5".
Good luck.
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For once, my memory serves me pretty well...