TKR6109 – Shock Spring Set (front, 1.6×7.5, 6.25lb/in, 57mm, purple) Vehicle Compatibility • TKR6109 - Shock Spring Set (front, 1.6x7.5, 6.25lb/in, 57mm, purple) is not included with any kit. • This can be used with the SCT410 2.0 vehicle and should be a direct replacement for the stock part or used as a feature. Please use the instruction manual for the kit(s) listed to verify compatibility and no additional items are necessary before purchasing.Click the link above to view other parts.