Moroso Blue Max Spiral Core custom-fit wire sets have a special strategically-wound 304 stainless steel conductor and Kevlar core that reduces the ohms of resistance per foot, while delivering more spark energy, better EMI suppression, and a higher dielectric strength. A tough synthetic silicone jacket resists high temperatures and oils, and the extra-thick EPDM layer adds greater electrical insulation. Compact silicone plug boots provide extra header clearance and feature fold-over crimped terminals for a secure connection.