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Exhaust Manifold for Caterpillar C15, 3406E – Part Number 4346111 Why Choose Our New Exhaust Manifold for the 3406E, C15? Brand new built to OEM specifications 2 Year parts and labor warranty IMPROVE PERFORMANCE AND EXTEND THE LIFE OF YOUR DIESEL ENGINE HHP’s Exhaust Manifold for the Caterpillar C15, 3406E produces a higher level of performance than OE parts and increases the life of your C15, 3406E diesel engine. Our Exhaust Manifold is engineered as an upgraded replacement to the OEM part with a perfect fit for easy installation. You’ll receive a brand new Exhaust Manifold built to OEM specifications and backed with a two year parts and labor warranty! Extra loud acceleration? Poor fuel efficiency? If so, your Caterpillar C15, 3406E may have a worn down or damaged exhaust system. As your C15, 3406E’s exhaust system wears, it can cause all sorts of engine issues and damage if not replaced. Fortunately for you, HHP has you covered! Replace your failing exhaust system with a New Exhaust Manifold 4346111 from Highway and Heavy Parts. Don’t risk the health of your C15, 3406E; buy a high-quality aftermarket 4346111 Exhaust Manifold from America’s trusted diesel engine parts supplier. At Highway and Heavy Parts, you’ll get an Exhaust Manifold manufactured in an ISO 9001:2015 certified facility, ensuring quality and consistency for your Caterpillar C15, 3406E. Each part is crafted with hard-wearing strength and durability to ensure your 4346111 Exhaust Manifold can withstand the rigors of the road. Guaranteed for fit and function, HHP parts have the right combination of quality and price with total support from our on-staff ASE-certified technicians. With specialized knowledge, quality products, fast shipping, and unbeatable customer service, HHP has you covered. Order your New Exhaust Manifold 4346111 today! From diagnosis through delivery, we’re Highway & Heavy Parts! Contents: Caterpillar C15, 3406E Exhaust Manifold – (4346111) Frequently Asked Questions What are the symptoms of a failing Caterpillar C15 or 3406E exhaust manifold? Recognizing the warning signs of exhaust manifold failure on your Caterpillar C15 or 3406E engine is essential for preventing costly secondary damage and maintaining optimal performance. Extra loud acceleration is typically the first and most noticeable symptom, presenting as a distinctive ticking, hissing, or roaring sound that becomes more pronounced as engine RPM increases. This excessive noise occurs when cracks develop in the manifold casting or when gaskets deteriorate, allowing high-pressure exhaust gases to escape before reaching the turbocharger and exhaust system. Poor fuel efficiency is another significant indicator that often accompanies manifold problems. When exhaust leaks compromise the pressure differential required for proper turbocharger operation, the engine’s electronic control module compensates by injecting additional fuel to maintain power output, potentially increasing fuel consumption by ten to twenty percent or more depending on leak severity. Loss of power, particularly noticeable when hauling heavy loads or climbing grades, results directly from reduced turbocharger boost pressure caused by exhaust gases escaping through manifold cracks rather than driving the turbine wheel effectively. Visual inspection often reveals exhaust soot streaks or carbon deposits around manifold flanges, mounting surfaces, and gasket areas, clearly marking where leaks are occurring. You might also detect a strong exhaust smell entering the cab, which happens when leaking gases migrate through firewall penetrations or ventilation intake areas. Check engine lights may illuminate with diagnostic trouble codes related to turbocharger underboost conditions, exhaust backpressure sensor anomalies, or oxygen sensor irregularities, all potentially linked to manifold integrity issues. In severe cases, operators report seeing glowing red spots on the manifold during nighttime operation, indicating extreme hea
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