STILLEN 606350 Grounding Kit - Silver Wires - 03-06 350Z / 03-06 G35 Sedan / 03-07 G35 Coupe Silver Wire Kit; Application-Specific Fitment For A Bolt-On Install Ensures Proper Ground to Sensors and Computers to Prevent Performance Loss Featuring 8-Gauge Copper Wire, Gold Plated Connectors and 4-Gauge and 8-Gauge Ring Connectors Improve Shifting and Reduce Shift Lag on Automatic Vehicles