Moroso 73617 Moroso Chevrolet Big Block Ignition Wire Set - Ultra 40 - Sleeved - Non-HEI - 90 Degree - BlueMoroso 73617 Moroso Chevrolet Big Block Ignition Wire Set Ultra 40 Sleeved Non HEI 90 Degree Blue Ultra 40 Custom Fit Wire Set, Blue Wire, Sleeved, BBC, Under Header Non HEI Exterior sleeving offers improved dielectric strength for added resistance to outside pulses while electrical protecting wire against heat, chafing and contaminants 8. 65mm diameter wire with 40 ohms of resistance per foot Sleeving adds extra dielectric strength Sleeving extends