Review on ACDelco 618W Original Equipment Spark by Gary Generale

These are standard replacement parts for C4 Corvette with L98. They are not marked with the order of installation, so you need to match the length of the wires with those that are already in the machine. I did this by removing and replacing the wires one by one. Comes pre-coated with dielectric grease. The wiring is quite tricky and I suggest having pliers and a friend to thread the wires around the motor. Old wire clips are more likely to become brittle and break, so you may want to replace them. Once installed it helped my Corvettes to idle.