Firewall Rubber Grommet.
Replacement firewall grommet for Aeroflow Performance LS wiring loom, can also be used in universal application.
Inside Diameter - 24.63mm (0.970")
Range of Inside Diameter - 25.90mm to 27.94mm (1.02" to 1.10")
Panel Hole Size - 50.8mm (2")
Outside Diameter - 61.97mm (2.44")