Exhaust Manifold
Highest Fit Accuracy
Exhaust Manifold
Highest Fit Accuracy
As a sensitive, flow-relevant component part of the exhaust gas system on the internal combustion engine, the exhaust manifold is responsible for collecting the exhaust gases expelled from the individual cylinders and routing them as required.
In this case, a demanding task is placed on the complex and flow-technically optimised component part. Both the dimensioning and highest fit accuracy on the cylinder head, the severe thermal demand through the peak temperatures at the turbo-charger, as well as the requirements on sealing with respect to other exhaust gas components, place the highest demands on the manifold.
HJS refers to development knowledge acquired over the years in the thermodynamic structuring of exhaust gas component parts, as well as knowledge of the raw materials involved in steel and casting manufacture.
A hair crack in the exhaust manifold can incorrectly affect the ex-works engine control.
Thus, this manifold entrains “secondary air”, through which the Lambda sensor transmits incorrect measured values to the engine electronics. With the sensitive exhaust gas values and applicable environmental laws, secondary air is a fault situation that must be excluded.
In order to simplify this process, all required built-in parts, such as seals, bolts, and nuts, are included in the delivery of HJS manifolds.
Advantages
1. Highest Fit Accuracy & Precision Engineering
- Perfect alignment with the cylinder head and turbocharger, ensuring optimal exhaust gas flow and engine performance.
- Flow-optimized design minimizes backpressure, improving engine efficiency and power output.
2. Superior Thermal & Mechanical Durability
- Built to withstand extreme temperatures (especially near the turbocharger) without warping or cracking.
- Made from high-quality steel/casting materials, ensuring long service life under harsh conditions.
3. Prevents Engine Control Errors & Emissions Issues
- Eliminates secondary air leaks (caused by cracks), which can distort Lambda sensor readings and disrupt engine management.
- Ensures accurate emissions compliance, avoiding fault codes or failed inspections due to false sensor data.
4. Complete Kit for Hassle-Free Installation
- Includes all necessary seals, bolts, and nuts, reducing workshop time and preventing installation errors.
- No need to source additional parts—ready to fit straight from the box.
5. Optimized for Turbocharged Engines
- Thermodynamically engineered to handle peak exhaust gas pressures and high turbocharger heat loads.
- Maintains sealing integrity with other exhaust components, preventing leaks and performance losses.
6. Expertise-Backed Design
- Leverages decades of HJS development in exhaust gas dynamics and material science for maximum reliability.
- Ideal for performance applications, commercial vehicles, and emissions-sensitive environments.
Area of application
The SCR system is used both in the private car and commercial vehicle sectors and the technology is widely used to reach Euro VI or EPA 2010 emissions standards. Many Non Road diesel engines also use this type of technology to reach Stage V which will be introduced in 2019 affecting the construction, marine, agricultural and forestry industries.
Further plans are also underway which will mean that the rail industry will also be required to comply with stringent emission levels. The HJS SCR system is available for a wide range of applications for both the Original Equipment and retrofit markets.
