Red Hot™ Power Tube for X7 R/T-Cyclone Hole:Yes FVA:Yes works with X7 Markers replaces stock power tube JCS X7 Red Hot power tube. The all-time most popular tube for the A-5, is now engineered just for the X7! Replacement for the stock plastic power tube in the X7. Precision machined aircraft aluminum power tube features red anodizing, incredible micro-finish, and tight fitting nylon set front velocity screw design keeps that front velocity set! Use with stock valve and internals. Includes one power tube and one CNC-machined Delrin hexadecagon front bolt. ***JCS tested with stock X7 non-low pressure***** *******JCS not tested with low pressure kits*******