MSD shrink sleeving can be used to protect connections throughout the vehicle as well as spark plug wires. Simply install the shrink sleeving over the connection and apply heat. The sleeving will shrink tightly around the wire and protect it.
Moroso 72030, Set of 18 Blue Plastic Shrink Sleeve High Performance & Racing Par
Taylor/Vertex 41058, Set of 16 Black Plastic Shrink Sleeve W/Numbers Performance
Moroso 72031, Set of 18 Black Plastic Black Shrink Sleeve 18 Pieces Performance
MSD Performance 3415 Helicore Accessories
MSD 3411 25' Pro-Heat Guard Hi-Temp Silicone Sleeve
8x Spark Plug Wire Boot Heat Sleeve Cover Shield For SBC BBC MSD Titanium 2500℉