SX/SXi/SXi Pro Can Someone ID this Pipe

This pipe came on the project 92 Sx I purchased before Christmas the only mark I see is a Capital "B". Any help for a newbie would be appreciated.

Thanks Roger

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Thanks guys. The ski needs a top end and a lot of maintenace/cosmetic work, so I will probably keep this pipe till I get it on the water and go from there.

Here are the carbs from the same ski, I guess SBN 38 or 42 or something like that.
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The ADA head has 24cc domes. I will probably have to buy some bigger domes, because race gas all summer is not in the budget. If anybody needs 24cc domes I would sure be willing to swap for ones with less compression.
 
Thanks for the info on the carbs. I sent you a PM if thats Ok. With my age and ability most riding will be just recreational with little to no freestyle, but it will be nice if the ski runs strong.
 
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