b'GM F/X AUTOX-PROtorque arm length optionsOur AUTOX-PRO Package utilizes the Speedtech Torque Arm Unit. It is Simple, Strong, Light & Affordable. We Can Have Them Made in Custom Lengths, But Anything Other than the Standard 57 Eliminates Us Utilizing the Bolt-In Prefabricated Front Crossmember. Instead, We utilize a Cut-to-Length K-Member Style Crossmember (Shown Below) Welded to the Subframe Connectors.GR50 Steel = 35% Stronger than Mild Steel & Mig Welds WellAsk RonAbout Upgrading to Our DecoupledTorque Arm! Custom Lengths Available to Tailor the Grip toUniversal Cut-to-Fit Your ApplicationK-Member Style of 1-3/4 x .095 Wall DOMFront Crossmember Round Tube Angle2 x 2 .120 Wall Braces Make the K 455257Tech Tip 5A: Why do we utilize a Torque Arm for Autocross & 3-Links for most RoadCourse applications?Time, or lack thereof. As much as 3-links are great at being tunable,there just isnt a whole lot of tuning time between rounds when Autocrossing. A pro of the Torque Arm suspensions is that they are simple & easy to set up. Torque Arms dont require any tuning, because other than length, they are basically non-adjustable. The key is choosing the right length of arm, because in most cases, the length cant be changed.Shorter arms provide higher Anti-Squat, more loading of the rear tires on initial & early accelerationless on later accelerationand even less on corner entry under hard braking, unless it is decoupled. A longer Torque Arm simply reverses these characteristics.A good road race & track car rule of thumb is for the Torque Arm pick up point to be under the Cars CG55 to 60 in most 108 WB cars. But for Autocross, we want a shorter arm, due to the lower corner speeds. We have found a 45-47 Torque Arm lengths is the sweet spot. Shorter lengths add more forward bite (more grip on initial acceleration) which is critical for coming off slower corners. For the higher speed corners of road courses, with higher corner exit speeds, longer arms work better. With 3-Links, we can tune the Instant Center to form this longer or shorter arm. With Torque Arms you need to pick your length based on priority. 131'