If u plan to not run the internal gate waste gate jus run a Block off plate on the external gate port an shall b sweet!
BUT if u plan on using a external gate and weld shut the internal gate flap, than its perfect for you to run an external gate waste gate an plumb it back into the dump pipe, prbs easier since u dont need to muck around heaps with mocking up dump pipe with little space down there
Or u can alternative run a T3 Manifold with no external gate port and run a T3 to T25 adaptor for a cleaner look
T28bb is gonna be a hella tight squeeze though in the civic engine bay, best of luck!
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