Dongfeng LoongGine Engine part Turbocharger compressor outlet intake transition pipe 1118136-E9E00

At the core of this transition pipe’s performance is an aerodynamically optimized internal flow path, designed using computational fluid dynamics (CFD) simulations to minimize airflow resistance and pressure loss. The pipe features a gradual, smooth transition from the turbocharger compressor’s outlet diameter to the intake manifold’s inlet diameter—avoiding sharp bends or sudden diameter changes that create turbulence. This design ensures a steady, high-velocity airflow (up to 25 m/s at maximum engine load) from the turbocharger to the engine’s cylinders, directly enhancing the turbocharger’s ability to deliver compressed air efficiently. By reducing pressure loss by up to 8% compared to generic transition pipes, the 1118136-E9E00 pipe helps maximize engine power output (increasing horsepower by 3-5% in dyno tests) and improves throttle response, especially during high-load operation (e.g., heavy hauling or climbing).

Crafted from 304 stainless steel with a wall thickness of 1.5mm, this transition pipe is built to withstand the high-temperature, high-pressure environment of the turbocharger air intake system. The 304 stainless steel material offers exceptional heat resistance, maintaining structural integrity even when exposed to compressed air temperatures up to 200°C—far exceeding the performance of aluminum or carbon steel pipes that may soften or deform under heat. It also features a passive chromium oxide layer that provides superior corrosion resistance, protecting against oxidation from moisture in the intake air and chemical contaminants (e.g., oil vapor from the turbocharger). Additionally, the pipe undergoes a bright annealing process to smooth the internal surface (Ra ≤ 1.6μm), reducing airflow friction and preventing carbon deposits from adhering to the inner walls. Through 3000+ hours of thermal cycle testing, the pipe shows no signs of warping, cracking, or corrosion, ensuring a service life of over 150,000 kilometers

Engineered to prevent compressed air leaks—a critical issue that degrades turbocharger efficiency—the 1118136-E9E00 transition pipe features a multi-point sealing system. Both ends of the pipe are equipped with precision-machined flanges with a flatness tolerance of ≤ 0.05mm, ensuring full contact with the turbocharger and intake manifold gaskets. The pipe includes high-temperature resistant silicone gaskets (rated for -50°C to 300°C) that compress uniformly during installation to form an airtight seal. Additionally, each flange is drilled with evenly spaced bolt holes that accept high-tensile stainless steel bolts (included with the assembly), distributing clamping force evenly across the flange surface to prevent gasket deformation. A secondary O-ring seal is integrated into the turbocharger-side flange to provide an extra layer of protection against leaks. Through pressure testing at 20 psi (the maximum pressure generated by Dongfeng LoongGine turbochargers), the pipe maintains a leak rate of less than 0.1 psi/min, ensuring no loss of compressed air

Designed for hassle-free installation and long-term reliability, the 1118136-E9E00 transition pipe requires no specialized tools or modifications to the engine. It comes with pre-assembled flanges, gaskets, and all necessary mounting hardware (stainless steel bolts and lock washers), eliminating the need for separate part sourcing. The pipe’s lightweight design (only 1.2kg) and pre-marked alignment indicators make it easy for technicians to position correctly, and the bolt holes align directly with the turbocharger and intake manifold’s original mounting points. The entire installation process takes less than 45 minutes using standard hand tools (e.g., a torque wrench and socket set). For maintenance, the 304 stainless steel construction is easy to clean—periodic wiping with a damp cloth removes dust or oil residue, and the corrosion-resistant material requires no additional treatments (e.g., painting or anti-rust coatings). Unlike rubber or plastic hoses that degrade over time, this metal pipe requires minimal upkeep, reducing long-term maintenance costs and vehicle downtime for fleet operators