606350R / 606350R - Application Notes ++Does Not Fit 2007 350Z++ You are losing horsepower and torque without STILLEN's new Grounding Kits for the 350Z and G35. Today's engine management systems utilize hundreds of sensors and in some cases over 12 onboard computers that constantly monitor all parameters of the engine and powertrain. Installing STILLEN's Grounding Kit ensures that sensors and computers are not affected by power surges that can drain performance. These kits were specifically engineered for 350Z and G35. This ensures that all wire diameters are optimal for amperage and current travel distance. These kits feature 8-gauge copper wire, gold plated connectors along with 4-gauge & 8-gauge ring connectors. Available in silver or red.