Traxxas Jato Big Block Extended Chassis Kit. Chassis is made from 6061 aluminum that is 3.03 mm thick. We re-heat treat it in house to our custom specs for the most strongest chassis that was ever produced. It will also last longer and take bigger crashes and you will be able to bend it back and continue to race. We built in (Crush Zone Technoligy) for front end high speed impacts. It took us over a year to test every engine combo and gear ratio that is out there. With the help of Texan Brad Swift we produced the most veristile, strongest, quickest and fastest chassis that will accept all most all the big blocks ever made and will also handle any gear ratio you can think about. Rite now all the fastest guys in the world are running our chassis.From drag racing to the 100 mph top speed goal.    r l c h o b b i e s . c o m   Proudly Made In The USA  (NOTE) the only engine we found that does not work with our motor mount is the Offna Traxxas T-Maxx 21 as this is not a true .21 big block block.