We were never impressed with the exhausting capacity of putting a normal QEV on the cyclone, and after seeing the idea behind X7 piston housing we decided to take it to the next level. We've combined those two venting ideas into one part. The materials we use are better than that of the stock piston housings, the internal finish is much smoother and is teflon coated, they perform much better (increasing speed and efficiency), and they look way cooler. This part is designed to do what the normal QEV (Quick Exhaust Valve) attempts to do. With the QEPH there are no gaskets to keep clean, and its exhaust is as fast as physically possible.
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