Cooling System
Cooling System – Complete Thermal Management Kit for Sitrak C7H
2026-07-31
SCR System
SCR System – Complete Selective Catalytic Reduction Kit for Sitrak C7H
2026-07-31

National V Exhaust System – Complete Emission Control Kit for Sitrak C7H

The National V Exhaust System is a comprehensive emission control solution designed to meet stringent Euro V standards for the Sitrak C7H. This complete system integrates the SCR catalytic converter, muffler, and all associated piping to ensure clean exhaust emissions and quiet operation.

This high-quality National V Exhaust System kit includes the Metal Hose Assembly, Muffler Bracket Assembly, Muffler Trim Panel, Tapered Sealing Gasket, V-Band Clamp, Exhaust Pipe, Exhaust Pipe with Urea Injector Boss, Half-Round Clamp, Clamp, Hexagon Head Bolts M8, Type 2 Full Metal Hexagon Locknuts, Sealing Gasket (diameter 149mm, stainless steel sheathed), Sealing Gasket (diameter 126mm), Heat Shield Assembly, Heavy-Duty Clamp,

SCR Valve Muffler Assembly, Muffler Auxiliary Bracket, Hexagon Flange Serrated Bolts M12*1.25, Muffler Upper Heat Shield, Upper Heat Shield Large Bracket, Upper Heat Shield Small Bracket-Front, Hexagon Head Bolts M8, Plain Washers, Hexagon Head Bolts M6, Upper Heat Shield Small Bracket-Rear, Trim Panel Mounting Bracket,

Hexagon Head Bolts M6, Cross Recessed Screw with Washer Assembly, Special Shaped Washer Nut (M6), Hexagon Flange Serrated Bolts M14*1.5, Hexagon Flange Serrated Nuts M14*1.5, Hexagon Flange Serrated Nuts M16*1.5, Exhaust Pipe Hanger, Rubber-Metal Cushion, and Hexagon Flange Bolts M10. Every component of this National V Exhaust System is engineered to OEM specifications for a perfect fit and reliable performance.

The National V Exhaust System features a high-efficiency SCR catalytic converter that reduces NOx emissions by up to 90%, combined with a specially tuned muffler that minimizes exhaust noise. The system includes a urea injector boss for precise dosing of Diesel Exhaust Fluid, ensuring compliance with emission regulations.

For complete technical specifications and ordering details, please refer to the official Sinotruk Catalog, which provides comprehensive information on all available variants and compatible truck models for the National V Exhaust System.

Whether you are replacing a damaged exhaust system or performing an emissions upgrade, this National V Exhaust System delivers factory-quality components and a straightforward installation. This National V Exhaust System is the definitive choice for operators who demand emission compliance and long-term durability.

National V Exhaust System

Component Details of National V Exhaust System

Metal Hose Assembly

This flexible metal hose connects the exhaust manifold to the SCR system. In the National V Exhaust System, it is made of corrugated stainless steel with a braided outer layer, providing flexibility to accommodate engine movement while resisting heat and corrosion.

Muffler Bracket Assembly

This bracket supports the muffler assembly and secures it to the chassis frame. In the National V Exhaust System, it is fabricated from 5mm thick steel with a powder-coated finish and includes rubber isolation mounts to reduce vibration.

Muffler Trim Panel

This decorative panel covers the muffler and provides a finished appearance. In the National V Exhaust System, it is made of stainless steel with a brushed finish and includes mounting brackets for easy installation.

Tapered Sealing Gasket

This gasket seals the connection between the exhaust pipe and the SCR converter. In the National V Exhaust System, it is made of high-temperature graphite with a stainless steel insert, capable of withstanding temperatures up to 800°C.

V-Band Clamp

This quick-release clamp securely joins the exhaust pipe sections. In the National V Exhaust System, it is made of stainless steel with a T-bolt design, providing even clamping force and easy disassembly for maintenance.

Exhaust Pipe

This is the main exhaust pipe that routes gases from the engine to the SCR system. In the National V Exhaust System, it is made of 409 stainless steel with a 3mm wall thickness, featuring mandrel bends for smooth flow and a bung for an oxygen sensor.

Exhaust Pipe with Urea Injector Boss

This pipe section includes an integrated boss for the urea injector. In the National V Exhaust System, the boss is precisely positioned to ensure optimal mixing of the urea solution with the exhaust stream for efficient NOx reduction.

Half-Round Clamp

These clamps secure the exhaust pipe to the hangers. In the National V Exhaust System, they are made of galvanized steel with a rubber-lined cushion to absorb vibration and prevent pipe damage.

Clamp

These general-purpose clamps secure various components of the National V Exhaust System. They are made of stainless steel with a worm-drive design for secure fastening.

Hexagon Head Bolt M8

These M8 bolts are used for securing brackets and hangers. In the National V Exhaust System, they are grade 8.8 and zinc-plated for corrosion resistance.

Type 2 Full Metal Hexagon Locknut

These locknuts provide a vibration-resistant fastening. In the National V Exhaust System, they are made of grade 10 steel with a deformed thread for prevailing torque.

Sealing Gasket (diameter 149mm, stainless steel sheathed)

This large sealing gasket connects the SCR converter to the muffler. In the National V Exhaust System, it is made of multiple layers of graphite with a stainless steel outer sheath, providing excellent sealing at high temperatures.

Sealing Gasket (diameter 126mm)

This smaller sealing gasket is used for other connections in the National V Exhaust System. Made from the same high-temperature material, it ensures leak-free joints throughout the exhaust system.

Heat Shield Assembly

This assembly protects surrounding components from exhaust heat. In the National V Exhaust System, it is made of double-layer aluminum sheet with an air gap for insulation, reducing underbody temperatures.

Heavy-Duty Clamp

These robust clamps secure the muffler and SCR converter. In the National V Exhaust System, they are made of 304 stainless steel with a heavy-duty band that resists deformation.

SCR Valve Muffler Assembly

This is the core component of the National V Exhaust System, combining the SCR catalytic converter and muffler into a single unit. It features a cordierite substrate with a platinum-based catalyst coating and a specially tuned muffler chamber for noise reduction.

Muffler Auxiliary Bracket

This additional bracket provides extra support for the muffler. In the National V Exhaust System, it is designed to work with the main bracket to distribute the weight evenly.

Hexagon Flange Serrated Bolt M12*1.25

These M12 flange bolts secure the main brackets. In the National V Exhaust System, they feature a serrated flange for positive locking and are grade 10.9 for high strength.

Muffler Upper Heat Shield

This shield protects the cab floor from exhaust heat. In the National V Exhaust System, it is made of aluminum sheet with a heat-reflective coating and is mounted directly above the muffler.

Upper Heat Shield Large Bracket

This bracket supports the upper heat shield. In the National V Exhaust System, it is made of galvanized steel and features adjustable mounting slots for precise positioning.

Upper Heat Shield Small Bracket-Front

This front small bracket provides additional support for the heat shield. In the National V Exhaust System, it is designed to fit in tight spaces and includes rubber isolators.

Plain Washer

These washers are used under bolt heads to distribute load. In the National V Exhaust System, they are zinc-plated and prevent surface damage to brackets.

Hexagon Head Bolt M6

These M6 bolts secure the heat shields and trim panels. In the National V Exhaust System, they are grade 8.8 and zinc-plated.

Upper Heat Shield Small Bracket-Rear

This rear small bracket completes the heat shield support system. In the National V Exhaust System, it is identical in construction to the front bracket but positioned at the rear.

Trim Panel Mounting Bracket

This bracket secures the muffler trim panel. In the National V Exhaust System, it is made of stainless steel and includes pre-drilled holes for easy attachment.

Cross Recessed Screw with Washer Assembly

These pre-assembled screws simplify the installation of trim panels. In the National V Exhaust System, they feature a cross recessed head and an integrated washer for even clamping.

Special Shaped Washer Nut (M6)

These special nuts are used in confined spaces. In the National V Exhaust System, they feature an integral washer and a low-profile design for clearance.

Hexagon Flange Serrated Bolt M14*1.5

These M14 flange bolts secure the SCR converter and muffler. In the National V Exhaust System, they feature a serrated flange for positive locking and are grade 10.9.

Hexagon Flange Serrated Nut M14*1.5

These locknuts pair with the M14 bolts. In the National V Exhaust System, they are made of grade 10 steel and feature a serrated flange for vibration resistance.

Hexagon Flange Serrated Nut M16*1.5

These M16 locknuts are used for heavy-duty connections. In the National V Exhaust System, they are grade 10 and feature a serrated flange for positive locking.

Exhaust Pipe Hanger

This hanger supports the exhaust pipe along its length. In the National V Exhaust System, it is made of rubber-encased steel and features a metal bracket for secure attachment.

Rubber-Metal Cushion

These cushions isolate vibration between the exhaust system and the chassis. In the National V Exhaust System, they are made of natural rubber bonded to steel plates, providing long-lasting damping.

Hexagon Flange Bolt M10

These M10 flange bolts secure various brackets. In the National V Exhaust System, they are grade 8.8 and zinc-plated.

Product Parameters of National V Exhaust System

No. Part No. Name
1712W15204-0025Metal Hose Assembly
2711W15502-5361Muffler Bracket Assembly
3712W15101-0017Muffler Trim Panel
4WG9925549690Tapered Sealing Gasket
5WG9925549697V-Band Clamp
6WG9925540821Exhaust Pipe
7712W15204-0026Exhaust Pipe with Urea Injector Boss
8WG9925549009Half-Round Clamp
9712W97420-0010Clamp
10ZQ150B0840Hexagon Head Bolt M8
11Q33208Type 2 Full Metal Hexagon Locknut
12WG9925540504Sealing Gasket (diameter 149mm, stainless steel sheathed)
13WG9925540505Sealing Gasket (diameter 126mm)
14712W15204-0017Heat Shield Assembly
15WG9903980060Heavy-Duty Clamp
16712W15101-0032SCR Valve Muffler Assembly
17712W15502-0135Muffler Auxiliary Bracket
18ZQ1811225TF6Hexagon Flange Serrated Bolt M12*1.25
19711W15110-0443Muffler Upper Heat Shield
20711W15502-5285Upper Heat Shield Large Bracket
21711W15502-5312Upper Heat Shield Small Bracket-Front
22ZQ150B0820Hexagon Head Bolt M8
23Q40108Plain Washer
24ZQ150B0625Hexagon Head Bolt M6
25711W15502-5314Upper Heat Shield Small Bracket-Rear
26712W15502-0006Trim Panel Mounting Bracket
27ZQ150B0620Hexagon Head Bolt M6
28WG9925540899Cross Recessed Screw with Washer Assembly
29WG1608740005Special Shaped Washer Nut (M6)
30ZQ1811445TF6Hexagon Flange Serrated Bolt M14*1.5
31ZQ1811440TF6Hexagon Flange Serrated Bolt M14*1.5
32ZQ3251411TF6Hexagon Flange Serrated Nut M14*1.5
33ZQ3251611TF6Hexagon Flange Serrated Nut M16*1.5
34712W15502-0050Exhaust Pipe Hanger
35WG84D 410007Rubber-Metal Cushion
37712W15502-0127Exhaust Pipe Hanger
38ZQ1841012Hexagon Flange Bolt M10

Why Choose Our National V Exhaust System?

Full Euro V Emission Compliance

The National V Exhaust System is designed to meet the strict Euro V emission standards, reducing NOx emissions by up to 90% and particulate matter by over 95%. This ensures your Sitrak C7H remains compliant with environmental regulations and avoids costly penalties.

Complete Kit with All Components

This National V Exhaust System kit includes every component needed for a full installation – from the metal hose assembly to the SCR muffler, all brackets, gaskets, clamps, and fasteners. The pre-assembled parts simplify installation, saving time and ensuring compatibility.

Durable Stainless Steel Construction

All exhaust pipes and major components of the National V Exhaust System are manufactured from 409 or 304 stainless steel, providing excellent resistance to corrosion, heat, and thermal fatigue. This ensures long-term reliability and maintains emission performance over the life of the vehicle.

OEM Quality and Precision Fit

The National V Exhaust System is manufactured to the exact OEM specifications, guaranteeing a perfect fit on the Sitrak C7H without modifications. The pre-formed pipes and precision-cast components ensure proper alignment and exhaust flow, reducing backpressure and improving engine efficiency.

Online Catalog of SINOTRUK Parts

Learn More

Our online catalog provides comprehensive access to genuine SINOTRUK parts for all major vehicle lines — including HOWO, Sitrak, Steyr, and Yellow River series trucks. You can browse detailed specifications, original part numbers, and exploded-view diagrams for every assembly. Whether you are performing routine maintenance or planning a major overhaul, the catalog helps you quickly identify the correct components for your vehicle. When you become a SINOTRUK customer, we offer complimentary full‑access catalog services, ensuring you always have the latest product data and interchangeability information at your fingertips to support efficient fleet management and accurate parts ordering.

2026-08-17

Frame Assembly – Genuine OEM Chassis Kit for Sitrak C7H

Frame Assembly – Genuine O […]
2026-08-17

Frame Assembly – Genuine OEM Chassis Kit for Sitrak C7H

Frame Assembly – Genuine O […]
2026-08-17

Seven-Function Combination Taillights – Genuine OEM Lighting Kit for Sitrak C7H

3‑Pc Seven-Function Combin […]
2026-08-17

Wire Harness Routing Bracket – Genuine OEM Cable Management Kit for Sitrak C7H

Wire Harness Routing Brack […]
2026-08-17

Install a fire extinguisher in the cab – Genuine OEM Safety Kit for Sitrak C7H

Install a fire extinguishe […]
2026-08-17

Front Drill Guard and Footrest Mount – Genuine OEM Installation Kit for Sitrak C7H

Front Drill Guard and Foot […]
Chat with us
Chat with us
Questions, doubts, issues? We're here to help you!
Connecting...
Please leave your inquiry and your phone. We will give you feedback within 12 hours.
Our operators are busy. Please try again later
:
:
:
:
Have you got question? Write to us!
:
:
This chat session has ended
Was this conversation useful? Vote this chat session.
Good Bad

Chat with us

We are a heavy-duty truck parts store. Please leave your contact information and inquiries. We will respond within 12 hours.