b'GM F/X AUTOX-RSX Build-Your-owncomplete suspension package The AUTOX-RSX (Ron Sutton ExtReme Design) is an All-in-One Package to Build Your GM Muscle Car into an Amazing Autocross Carwith only Minor Fabrication Required. This Complete Car Suspension, Steering & Chassis Package is Not for Your Typical Pro-Touring Car. this Package Has Be e n Specifically Engineered with Serious Race Technology, Top Quality Components & Optimized Geometry to Win Muscle Car Autocross Events Allowing 315 or 335 Front Tires.Road CoursesThis Package Features the Speedtech ExtRemeFront Subframe. Ron Sutton Designed this Suspension & Steering Geometry from a Clean Sheet of Paper. Combined with the RSRT Decoupled Torque Arm/Watts Link Rear Suspension & Decoupled Piston RSRT/ARS Shocks Your GM Muscle Car Will Have Amazing Autocross Handling. The Roll Bar & Subframe Connectors Add Chassis Rigidity that Makes the Car Crisp & Responsive to Driver Input, as Well as More Responsive to Tuning Changes.142'