WG9725540002 HOWO Muffler Assembly

The WG9725540002 HOWO Muffler Assembly is a key exhaust system part for SINOTRUK HOWO heavy-duty trucks (T7H, T5G, TX models) matching WP10/WP12 diesel engines. It integrates noise reduction and exhaust purification: multi-layer baffle + resonance chamber structure reduces exhaust noise by 35-40dB (meets national noise standards), and cooperates with after-treatment systems to reduce harmful emissions (complies with National V regulations). This creates a quiet driving environment, reduces pollution, and avoids traffic violations. We use high-quality materials and precise manufacturing: the shell is high-temperature resistant Q345 carbon steel with anti-corrosion coating-heat-resistant and anti-corrosion. The internal baffle is 304 stainless steel-wear-resistant and anti-deformation. The sealing gasket is high-temperature graphite-heat-resistant and leak-proof. The flange specs, bracket positions, and connection ports fit the original HOWO exhaust system exactly, so it installs with no mods. It handles tough conditions-600℃ exhaust heat, 2-350Hz vibration, gravel impact, and rain/salt corrosion-without shell rust, baffle deformation, or sealing leaks. Swapping it is easy: no need to adjust exhaust pipelines or brackets, just disconnect flange bolts, remove old muffler, install new assembly in original position, tighten bolts, and test exhaust. Before shipping, we test 'em strict: check noise reduction efficiency, exhaust resistance, air tightness, and high-temperature durability-so it's reliable. We've supplied to 70+ SINOTRUK after-sales, repair shops, fleets for 10 years-users praise its noise reduction effect and stable performance.

Product Model: WG9725540002​

Applicable vehicles: SINOTRUK HOWO T7H/T5G/TX (original exhaust system, matching WP10/WP12 diesel engines)​

Type: Muffler assembly (Q345 carbon steel shell + 304 stainless steel baffle + graphite gasket)​

Function: Reduce exhaust noise, optimize exhaust flow, assist purification, comply with noise/emission standards​

Material: Shell (Q345 carbon steel, anti-corrosion coating); baffle (304 stainless steel); gasket (high-temperature graphite)​

Installation: Direct replacement-fits original exhaust flange and bracket specs​

Working conditions: -30℃~600℃; noise reduction ≥35dB; back pressure ≤3kPa; ≥300,000 km life

①Excellent noise reduction: Multi-layer baffle + resonance chamber reduces exhaust noise by 35-40dB-complies with national standards, creates quiet driving.

② Low resistance & smooth exhaust: Optimized airflow channel minimizes back pressure (≤3kPa), ensuring engine power-20% less power loss vs ordinary mufflers.

③ Perfect for HOWO: Made to HOWO's original exhaust design-flange specs, brackets, connection ports match. No adapters or pipeline mods needed-saves 38% maintenance time vs universal mufflers.

④ Durable & corrosion-resistant: High-temperature carbon steel shell + 304 stainless steel baffle resists heat/corrosion/impact; graphite gasket keeps tight. Works stably in extreme conditions-lasts 300k+ km.

This Muffler Assembly (Model: WG9725540002) is only for SINOTRUK HOWO T7H/T5G/TX models with original exhaust systems (matching WP10/WP12 diesel engines). It won't work on other HOWO models (A7) or non-SINOTRUK brands (Shaanxi Automobile DeLong, FAW Jiefang). Those have different exhaust structures, flange specs, or exhaust parameters-this muffler assembly won't fit or work.

Q1: Works on HOWO A7 trucks?​

A1: No-HOWO A7 has different exhaust structure/flange size. It causes mismatched installation, poor exhaust, or excessive noise, leading to power loss or emission non-compliance. Get the HOWO A7-specific muffler assembly instead.​

Q2: Engine power decreases/noise increases after new muffler install?​

A2: First check installation (flange tight, no air leakage, no foreign matter blockage). If good, clean exhaust pipeline (remove carbon deposition/debris). If pipeline is smooth, replace muffler if internal structure is damaged. Still problematic? Contact after-sales.​

Q3: How to maintain the muffler assembly?​

A3: 1. Check flange connection and gasket for leaks every 30k km (replace gasket if damaged); 2. Clean internal carbon deposition every 100k km; 3. Avoid shell collision; 4. Wash shell regularly (especially coastal/snowy areas).​

Q4: Need to replace exhaust pipe gasket with new muffler?​

A4: Highly recommended. Old gaskets are prone to aging/deformation, causing air leakage, increased noise, and reduced efficiency. New gasket ensures tight sealing and optimal exhaust performance.

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