Twin turbo y-pipe question
 

Can someone tell me if these are aftermarket? And if so what brand, they came on my 93 fd which also had apexi twin intakes..thanks in advance fellas
https://cimg5.ibsrv.net/gimg/www.rx7...185f39cf1f.jpg
https://cimg8.ibsrv.net/gimg/www.rx7...1fd7c55f80.jpg
https://cimg3.ibsrv.net/gimg/www.rx7...5feeecc745.jpg
https://cimg6.ibsrv.net/gimg/www.rx7...54ddb29b3c.jpg
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Yea, they're made by mazda. Those are the n3a1 twin turbski intake systems. Those came with the flapper door for the sequential system. It was a factory installed option.