Some ACDelco Gold parts may have formerly appeared as ACDelco Professional Premium aftermarket replacement part Manufactured to meet specifications for fit, form, and function for General Motors vehicles as well as most makes and models Rust-preventative coating provides corrosion protection for superior durability Inspected for balance resulting in smooth brake operation and noise reduction Independently tested, including D3EA, along with Noise/Vibration/Harshness (NVH) and durability/wear testing resulting in high quality and reliable products Follows original manufacturers' designs for dispersing heat, helping to prolong pad and rotor life while reduce noise and vibration