This kit works amaazing in my stampede, but you NEED to use a metal gear set, and a lipo, 2s or 3s, IMRs dont work. it took my stampede fron a heavy wimpy thing to about 75 fps, with the AR removed. it would hit much better with a better barrel, either brassed or an Ezekiel half dart breech. if you already have a stampede and a lipo i would recommend, but dont get a stampede just for this if you are not going to replace the barrel/breech.
Spring kit is great, my old broken stampede is now fixed and works better than ever!