buschur cast manifold vs. tubular manifold eg. full race, ams...
#30
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As far as I know AMS does not make a manifold for the stock turbo flange.
I would recommend our porting & coating service for the stock manifold. It is $195 and has performed flawlessly against other manifold options. The ONLY manifold that out performed the stock ported & coated is the Full Race.