STILLEN 402834 Hi-Flow Intake Kit With Z-Tube - 03-07 G35 Coupe / 03-06 G35 Sedan Z-Tube Constructed of Roto-Molded Plastic; Connections For All Factory Breather Tubes Increased Throttle Response, Adds 11HP Sedan, 5HP Coupe Genuine K&N Air Filter w/ 1,000,000 Mile Warranty Eliminates Factory Baffling, Increasing Flow Efficiency; Limited Lifetime Warranty