TKR7039 – Shock Spring Set (front, 1.4×8.375, 4.63lb/in, 50mm, grey) Vehicle Compatibility • TKR7039 - Shock Spring Set (front, 1.4x8.375, 4.63lb/in, 50mm, grey) is not included with any kit. • This can be used with the SCT410SL 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.