TQ offers premium brake parts at reasonable pricing and have been the reference accross North America for over 40 years. CMX proprietary alloy formulation gives our hardware spring kits the ideal balance between tensile strength and hardness Load-Deflection (LD) tested for maximum tolerance to a voluminous amount of spring loading and unloading cycles Precision CNC-cut finish ensures perfect OE-fitment; resulting in smooth spring tension and vibration reduction Thickness and Metallurgy electronically validated for manufacturing consistency Independently tested for Noise/Vibration/Harshness (NVH) and durability/wear; resulting in high-quality and reliable products Part Reference Numbers : 17509K 17386 HW17386 H17388 H17263 H17386 Interchange Part Number(s): 17509K 17386 HW17386 H17388 H17263 H17386