Heat Shield And Wire Protection | JEGS Protect those wires with heat shield and wire protection from JEGS. Slide on wire heat shields are perfect for engine compartment wire looms especially on the engine. Flat heat shield material can be used to deflect heat away from areas like the inside of your car. Engine Wiring Harness We are an experienced Taiwan Engine Wiring Harness manufacturer, supplier, exporter and factory. Our products supplied and exported worldwide relying on our professional talent and good experience. We manufacture products to suit the exact requirement of our client ranging from small business to huge manufacturing units.