Full System

Specialist in Harley Davidson motorcycle equipment, the Holy Death store offers a wide range of motorcycle exhaust lines. Besides, you will find the best brands and models of exhaust systems for your Harley-Davidson :

• Softail
• Sportster
• Dyna
• Big Twin

It appears that in fact, Harley-Davidson exhaust manufacturers offer just as many complete exhaust lines, a pair of gaskets, or a tip. Indeed, riders change the exhaust system first to regain the unmistakable sound of the engine.

Also, a wise motorcyclist will suddenly change the air filter and opt for new mapping.

Finally, exhausts are considered wear parts.

What is the exhaust line made of ?

On the face of it, the exhaust system of all Harley-Davidson models has at least two essential elements. This is because the manifold allows the exhaust gases to be discharged. Besides, the muffler reduces noise and limits polluting emissions from the engine.

On the other hand, the catalyst works in conjunction with electronic fuel injection.

The exhaust manifold 

First, the manifold of a Harley-Davidson engine brings the different lines together through a cylinder, towards the outlet leading to the muffler. Moreover, the twin is fitted with a “1 in 1” or “2 in 1” manifold.

Also, the exhaust silencer makes it possible to improve the gas outlet speed and engine efficiency as well as carburetion, thanks to the effects of pressure and backpressure.

In general, you can find different models of stainless steel manifold.

The catalyst

In principle, the catalyst is necessary on modern engines (Euro 2 and +). Acting as a particulate filter, it transforms toxic microparticles and polluting elements into harmless chemical principles. Moreover, it is an integral part of the manifold. Because it is placed upstream of the baffle.

The exhaust silencer

Reducing noise pollution and dampening the leakage of burnt gases, the stainless steel silencer fulfills its mission thanks to 3 types of technologies.

• Engine chamber
• Motor Reflection
• Motor Discs

Thus, the exhaust line regulates the flow of gas and the sound level thanks to the motorcycle silencer.

How does a Harley-Davidson Motorcycle Exhaust Work ?

At first glance, the pressurized cylinder expels noise and heat emissions through the stainless steel exhaust. This is because the exhaust valve opens before the end of the combustion time. Moreover, the piston, the high position of the PMB towards the TDC, finalize this expulsion of the exhaust gases.

Furthermore, the launch of this operation is characterized by a large pressure differential between the start of the manifold and the outlet.

Thus, the escape of the burnt gases by the cylinders decreases the pressure as the piston rises towards TDC. Hence, the exhaust gases leak to the combustion chamber, by a back pressure effect.

Likewise, the exhaust gases wave into the manifold, which the muffler changes into a continuous flow.

On the other hand, the homologation of an exhaust line can lead to a gain in power.

Finally, an approved racing line eliminates the catalyst and the baffle for better performance.

The materials constituting the exhaust line

In general, the parts of the complete lines are made of resistant and robust materials.

• Steel: standard exhaust lines to easily bend pipes and exhaust pipes
• Stainless steel: Stainless steel exhaust is more resistant to wear, allowing the installation of thinner tubes than its steel counterpart
• Titanium: classic sport exhaust on the circuit allowing a gain in weight, but whose end caps and lines are very expensive

Cependant, vous pouvez trouver certaines pièces détachées ainsi que des pièces de rechange en chrome, alu, céramique ou autre matériau.

However, you can find some spare parts as well as spare parts in chrome, aluminum, ceramic or other material.