Dongfeng Renault engine parts National V front section exhaust pipe D5010224874

Exclusively tailored for Dongfeng Renault engine models, the front exhaust pipe is developed via 3D laser scanning of the original engine bay and exhaust manifold layout. It replicates every critical detail: flange bolt pattern (4-bolt, 120mm center circle) matching the exhaust manifold, bend angles (35° and 90° for optimal underbody routing), and mounting bracket positions—all within ±0.05mm tolerance. Unlike universal pipes that require cutting, welding, or adapter flanges, it directly bolts to the engine’s exhaust manifold and rear exhaust section using OEM-matched gaskets. This precise fit eliminates exhaust leaks (which cause emission failures and power loss) and ensures no interference with engine components (e.g., turbocharger, oil lines), preserving the engine’s original performance and safety

Built to withstand extreme exhaust temperatures (up to 750°C, common at the manifold outlet), the pipe is crafted from 304-grade stainless steel with a 1.8mm wall thickness. This material offers exceptional thermal stability—resisting warping, cracking, or deformation even during prolonged high-load operation (e.g., uphill hauling). Unlike mild steel pipes that degrade within 6–12 months, 304 stainless steel provides superior corrosion resistance to exhaust byproducts (sulfuric acid, moisture) and road salt, ensuring a service life of 5+ years. The pipe’s inner surface is deburred and polished to reduce flow resistance, while the outer surface features a heat-resistant oxide layer that prevents discoloration and further enhances durability

Engineered to maximize exhaust efficiency, the front pipe features a mandrel-bent construction that creates a continuous, smooth internal pathway—eliminating the flow restrictions common in crush-bent pipes. This design reduces exhaust backpressure by 20%, which directly improves engine performance: it boosts low-end torque by 3–5% (critical for heavy-load acceleration) and enhances fuel efficiency by 2–3% (translating to significant cost savings for fleet operators). The pipe’s length (650mm) and bend radius (50mm) are calibrated to match Dongfeng Renault’s engine airflow characteristics, ensuring no disruption to turbocharger spooling (a key factor in power delivery). Additionally, the smooth flow minimizes turbulence, reducing stress on downstream emission components and extending their lifespan

The pipe’s design prioritizes durability and ease of maintenance. It includes reinforced welds (TIG-welded for strength and leak tightness) at all bend and flange joints, preventing fatigue cracks from engine vibration. The manifold flange is thickened (12mm) and heat-treated to resist warping, ensuring a tight seal with the exhaust manifold gasket (included in optional kits). For installation, the pipe comes with pre-drilled mounting brackets that align with the engine bay’s factory points, and it uses OEM-specification bolts (M10×30, grade 8.8) for secure fastening. Technicians can complete replacement in 30–45 minutes using standard hand tools—no specialized welding or cutting required. Backed by a 24-month warranty against manufacturing defects (e.g., weld failure, corrosion, or structural deformation), it provides reliable exhaust performance and peace of mind for Dongfeng Renault engine owners