Only aluminum horn I've ever seen used is the tlr short one...I've never used it myself...and I had to edit my last post to put in the steel one piece as an option used, sorry forgot it and the gear guard the first time lol...its extremely nimble and took a few decent tumbles too....the one thing not shown in my kit is the carbon bellcrank steering brace..at the time they didn't have them ready and I didn't want to wait..