Types of headers

Headers are a part of a car that is installed on the cylinder head instead of the factory exhaust pipe. Using this part, the combustion gases inside the cylinders are discharged more quickly, which increases the lifespan of the cylinder and cylinder head, and also increases engine efficiency. The use of headers in tuned and sports cars is quite common and is widely used by famous companies.
One of the ways to classify headers is according to the length of their runners. In general, headers are divided into three categories in terms of length:
1. Short-length headers: These types of headers are longer than the factory type of car and can increase engine power. Since there is less empty space inside the hood in more modern engines, these types of headers are easier to install. Just as the long type is suitable for high engine speeds, the short type improves the exhaust gas velocity at low speeds.
2. Long-length headers: The scavenging effect is clearly visible in long-length headers. In addition, these types of headers are usually more expensive, more difficult to install, and take up more space. But on the other hand, their advantages are greater, such as: 
• Best for racing and high efficiency
• Improved torque in some cases
• Best way to get the highest power
• Available in different sizes and lengths for racing models Operating at appropriate engine speeds
3. Medium-length headers: These types of headers have some of the features of long-length headers and some of the features of short-length headers. Their initial pipe length is longer than the manifold, so it can work well at low and medium torques. Since its length is not relatively long, it creates a suitable distance for sleeper cars.
Another way that headers are categorized is according to the type of pipe connections and their bends.
To improve the efficiency of the headers, Engine Arts uses mandrel-bent pipes to prevent any sudden changes in direction in the pipe and back pressure to the cylinder. Using an elbow causes the flow path to change direction suddenly in a shorter length, which will cause pressure to be concentrated in the elbow. The result is a failure in the elbow or the flow moving towards the cylinder outlet ports.
The type of pipe connections is also very important. Typically, two types of headers are used for four-cylinder cars: 4-into-1 or 4-into-2-into.
1. 4-into-1 headers: In the 1-4 header design, all 4 pipes are combined into one collector at the same time. According to most dyno tests, these types of headers produce more power at medium and low engine speeds because the flow inside the pipe is more optimal. It is true that these types of headers increase the power range, but at higher engine speeds they give the person the feeling that they are performing a little weaker than 1-2-4 headers.
2. 4-2-1 Headers: In this type of headers, the exhaust pipes of the cylinders that are 180 degrees out of phase with each other are first connected and then connected over a longer length. This type of headers helps the engine's volumetric efficiency remain high at higher engine speeds and is ideal not only for high engine speeds but also for medium engine speeds. Now, if these headers are of the one-piece type, their weight will also be lighter.
Engine Arts Company's products are in two types: 4-to-1 headers for Peugeot Pars vehicles with TU5 engine, Peugeot 206 vehicles with similar engines (type 5 and 6) and Nissan Ronis with K24 engine, as well as 4-2-1 headers for Pride vehicles with M13 and B3 engines, Tiba and Quick, Peugeot 206 type 5 and 6 with TU5 engine, type 3 with TU3 engine, Samand with Melli EF7 engine, Peugeot Pars with XU7 engine or Peugeot Pars ELX with Xantia engine (1800 to 2000 cc), XU10J4, (GTi6) J4R, J4Rs engines. You can refer to the company's product list to view.