This is the Electrolock Ignition Cable Firewall Grommet for all 1929-1932 Chevrolet cars & trucks. Grommet fits 1-11/16" hole in firewall for the ignition cable. Dimensions: 1-13/16" OD x 9/16" ID for 1-11/16" hole. Center hole is molded at an angle as original. Replaces GM# 356344

1927-60 Grommet, electric wire through firewall. 7/16” ID. for 11/16” hole. Replaces #117961

This firewall insulator fits all 1929-1930 Chevrolet cars & trucks. Replace that dried-up, cracked or missing firewall insulator with a new die-cut rubber insulator. Made to fit firewall curves just like the originals. Insulators are shipped ready to install; no cutting required. Give your restoration a finished appearance! These firewall insulators are rubber and a show quality piece, Made in the USA!