Seals-It Firewall Grommet 2-Hole 5.250 x 1.50 O.D. Blank ProTru by Wiseco #4241 wont fit 1991 and

#4241 wont fit 1991 and later big-block Gen V & VI engines

Large-diameter 3-1/2" gauge face indicates percentage of leakage rather than psi

stop sooner and pack very easily by one person in 4 or 5 minutes

Pro-90 1300 Series

Seals-It Firewall Grommet 2-Hole 5.250 x 1.50 O.D. Blank ProTru by Wiseco #4241 wont fit 1991 andProduct Description: Firewall Grommet Blank 5. 250 x 3 in 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.