Elite Engineering 1/4" Thermal Tunnel Plate Will Fit: 1997-2004 C5 Corvette At a full 1/4" thick 6061-T6 aluminum, this plate is twice as thick as your stock OEM Tunnel Plate; Coated on all sides with a specially engineered ceramic coating and then bonded to a composite-fiberglass thermal barrier. This is the best choice to offer both chassis stiffening and superior heat shielding to reduce the amount of heat transfer from the exhaust. Installation: Approx. 2.5 hours using jack stands or rhino ramps. Instructions are included. This item features FREE SHIPPING!