Daystar, Universal Firewall Boot, Single, Accommodates 3/8" to 1" Diameter Wire Bundles, fits any vehicle that needs a wire loom, KU20040BK, Made in America , Black

Daystar's Firewall Boot is the best way to run wires, hoses, and other lines through your vehicle's firewall. Simply drill a 1.25 inch diameter hole in the firewall and install the boot. Run your wires, trim the boot as necessary to one of three different sizes (3/8 inch, 11/16 inch, or 1 inch), and secure the assembly with a zip tie.