Normally when any moving vehicle is cruising at highway speeds, dynamic force is applied to the vehicle where it attempts to lift the nose off the ground. The Fairlady Z was designed with zero lift however, the vspeed and Veliside was taken further by actually creating minus lift (downforce). This benefits a more stable ride during any form of driving whether cruising or high speed. Improved cornering characteristics combined with excellent tire grip and great steering response, an overall improved stability and reduced roll and pitch can be experienced.Not only does the extended 89mm front nose fascia create tremendous downforce of the machine, but like the Super GT vehicles, the incoming air is directed to the front wheel wells of the chassis. The front underspoiler effectively sends the air to the rear bumper, and along with the dual deck rear spoiler(Velisdie version 3), vehicle lift is kept at a minus level. The side sill protector enhances the sleek exterior qualities of the Fairlady Z while smoothing the air flow in the area between the front and rear wheels. The large diameter, all stainless steel muffler setup amongst other parts were designed to freely counterpart with the entire vehicle, to maintain the racing sensation in its finest form.