These lightweight "LSX" motor mount stands bolt on in place of the factory's heavy solid cast iron stands on 1998-2002 GM F-Body cars. They look trick, and drop close to 5 pounds! They will work with the stock k-member, or on the tubular k-member we offer and any aftermarket k-member designed for stock type motor mount stands. Built with CNC cut 3/16" steel mounting pads and CNC cut and formed 1/4" thick steel motor mount u-brackets joined together with 1" x 2" x .120" wall tubing. Finally they fully gusset them so they're built to handle some serious horsepower!