'Exhaust Pipes'

• With an internal combustion engine exhaust pipes are usually part of an exhaust system which conveys burnt gases from the engine and includes one or more exhaust pipes
• Design criteria: The gases from car engines are very hot; the pipe must be heat-resistant, and it must not pass through or near anything which can burn or can be damaged by heat
• Terminology:
  • Manifold or header: Manifolds are often made of cast iron in stock production cars, and may have material saving design features such as to use the least metal, to occupy the least space necessary, or have the lowest production cost
  • Headers are usually circular steel tubing with bends and folds calculated to make the paths from each cylinder's exhaust port to the common outlet all equal length
  • They are joined at narrow angles to encourage pressure waves to flow through the outlet, and not back towards other cylinders
  • Most car performance enthusiasts buy aftermarket headers made by companies solely focused on producing reliable, cost effective well designed headers specifically for their car
  • Turbo-back: Turbo-back (or turbo back) is to the part of the exhaust system from the outlet of a turbocharger to the final vent to open air
  • Turbo-back systems are generally produced as aftermarket performance systems for cars with turbochargers

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