Restrictive exhaust causes the engine to work harder to force exhaust gases out of its cylinders, and it hampers the engine'sability to scavenge burned exhaust gases. Balance tubes connect the exhaust pipes in a dual-exhaust system and work to balance the exhaust gas pressure and pulses between exhaust pipes. The partial vacuum created behind a race car at high speeds where a pocket of low air pressure is created. Two cars lined up nose to tail, the slip stream behind the first car is greatly reduced and the second car does not have to push a wall of air in front of it, essentially producing the drag of one vehicle. A term that describes the shape of a tire.
Underinflated tires tend to sag,while overinflated tires have a very upright profile.
Sixty pounds of air pressure is required for the measurements. Allows the helmet to rest against it to reduce the wear on the driver's neck muscles. Also, in an accident, it can reduce the chance of neck injury. Contains the ignition switches, starter switch, and switches that control the radiator, brake, transmission fans and rear-end gear. Gauge used to inform driver about how many revolutions per minute the engine is turning.