Seals-It Firewall Grommet 4.00" O.D. Blank RU001003L Billet stock style neck that

Billet stock style neck that accepts the stock cap

1969-1969 Mercury Comet

The carbon rotor button in a stock HEI distributor cap has very high resistance

The pressure upon the head can be adjusted by replacing the special foam rubber pads placed between the earmuff and the helmet

Seals-It Firewall Grommet 4.00" O.D. Blank RU001003L Billet stock style neck thatProduct Description: Firewall Grommet 1 Hole 4 in OD Aluminum Rubber Black Sold Individually From asphalt and dirt track racers Seals It rod end seals get the job done. In business for over 25 years, Seals It manufactures seals, grommets, and other automotive products for many industries including NASCAR, motorsports, and 4x4 off road vehicles, as well as agricultural, aerospace, transportation, and other applications.