Feature●Helps provide a tight seal for your vehicles exhaust connections●Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)●GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors●GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle●GM regularly updates production and service part designs to integrate new materials and technologiesDescription 4.3L. 2011-13. 5.3 & 6.2L, 5.3L.