Kirrawee Mufflers

453 The Boulevarde, Kirrawee NSW  2232

The System

 
It plays a critical role in the efficient operation of your vehicle by removing hot poisonous gases, reduces engine noise and improves your engine's performance and fuel economy.
 
Most systems are made from aluminised coasted mild steel which resists corrosion (usually come with a 2yr warranty).  Components are also available in stainless steel to prolong the life of your system (usually come with an 8yr warranty).
 


Exhaust/Manifold  situated at the front of the system and bolted to the engine, the purpose of a manifold is to guide poisonous gas and heat into other components of the system.  Manifolds are usually made from cast iron (to withstand extreme temperatures - up to 1300 degrees Celsius!).  Due to this heat, they are prone to cracking.  In some cases the manifold has been replaced by 'extractors' (otherwise known as 'headers').


Engine Pipe  connecting the manifold to the catalytic converter, heat (now less extreme at around 1100 degrees Celsius) and poisonous gases pass through to the cat converter.


Catalytic Converter  this component converts the harmful gases into carbon dioxide, water, nitrogen and oxygen.  Three way converters are the most common and contain a honeycomb like biscuit which is impregnated with three types of precious metals.  The cat converter is 200 degrees at operating temperature reaching 600-800 degrees at optimum efficiency.

Front / Centre / Intermediate Muffler  otherwise simply known as the 'intermediate assembly', in some systems this would consist of a resonator positioned at the front with a muffler at the rear.  The resonator is a small muffler designed to take the resonance out the noise and the front (also known as 'centre') muffler continues to reduce the noise further from here.
 


Intermediate Pipe  Sometimes also known as the over axle pipe, this connects the front assembly to the rear muffler.  This component would go over or under the rear axle vehicle dependant.



Rear Muffler This is the final part of the process and is responsible for giving the final 'note' to your system.  Gases pass through the rear muffler at approx 200 degrees Celsius.  Corrosion due to condensation forming in this part of the system (particularly in cars travelling short journeys) is quite common.



Tail Pipe / Exhaust Tip the tail pipe ensure that gases pass from the rear muffler correctly.  Exhaust tips (chrome, stainless or a mix of both) are applied and simply give your system a polished off look.


Other Components rubber hangers or mountings are used to attach the system to the vehicle.  These help reduce problems and damage caused to your system by vibration.  It is important to have these checked when your vehicle is being serviced.

 
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