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Here is a close look at the interior layout of the Trick Flow Box R plenum, from the top and bottom sides. Notice the even spacing of the runners, and how the entry into each port is slightly ported to reduce turbulence. We dig the fact that this upper has a removable lid, which will make additional porting simple (if Greg cares to go there), and the O-ring that keeps high-pressure air inside the box. On the discharge end of the runners, the staggered rectangle spacing is apparent.