STILLEN 606358 Grounding Kit - Silver Wires - 07-08 350Z / 370Z / 07-08 G35 Sedan / 08-12 G37 Coupe / 11-12 G25 / 11-12 M37 / 11 M56 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