Got a Power Plenum from my buddy Derrick @zx10wall this week. Fits Streamline and Wildcat. I shot a 10 shot string average 860 FPS with 18.1 JSB. Took 15 minutes to install the power plenum. Filled back to 220 bar. 10 shot string average 883 FPS. Nothing else was changed. Reg pressure the same, HST the same. So an increase of 23 FPS. Photos below. The PP is the matte black section between breech and pressure tube. Super easy to install. PS. That nice looking stock is courtesy of my shooting buddy Nick @socaloldman who refinished it for me. They don’t look that good from the factory... PPS., you can’t see it in the photo, but the shroud is still an inch longer than the pressure tube.