Our Front & Rear Shock Towers are based on our Slash 4x4 shock tower designs with proven performance and durability. We revamped the design of our Slash 4x4 shock towers and modified them to accommodate the clip-less body mounting system that the Rustler 4x4 & Hoss 4x4 utilize. The results are a perfect blend of old and new that is tough, rugged and can handle whatever your track or bash location can throw at them! RPM Rustler 4x4 & Hoss 4x4 Shock Towers are molded in our bulletproof blend of engineering grade nylons and come with our limited lifetime warranty against breakage. Don't let a fun race or bash day get cut short with inferior parts. Trust RPM with parts designed, engineered and manufactured in the USA! Technical Notes: RPM Front Shock Towers for the Rustler 4x4 and Hoss 4x4 replace stock Traxxas RPM6739.