Boyesen Rage Cage Power Pack New for easy on and off 1015 1137 for easy on and off Includes a nylon pouch with a Velcro closure You get Rage Cages and PowerWings with all required hardware at a savings over individual parts purchased aloneDyno tested and proven with runs that verify HP gains are achieved sooner peak higher and carry longerSignificantly less power drop when exhaust valves openCast aluminum body will not fail or tear like plastic or rubber partsDual stage carbon reed design for improved performance and extended reed petal lifePowerWings optimize the throttle body to maximize air volume for quicker throttle response and stronger accelerationSimple bolt on installation with no modifications required