8211 MSD Firewall Feed Thru, Red

Firewall Feed Thru, Red MSD Firewall Feed Thru, Red The Firewall Feed-Thru provides 1/2 inch of insulation to ensure that the coil spark reaches the distributor. To prevent voltage leaks in passenger compartment mounted coil installations, MSD designed the Firewall Feed-Thru. Molded from rynite a hi dielectric strength material. Absolutely the best way to route spark plug wire through the firewall