The 4 State Trucks Blog

Let’s break down how to maintain peak emissions performance and avoid excessive repairs on big truck exhausts. Key Takeaways DPFs trap soot, while DEF reduces harmful nitrogen oxide emissions. Watch for warning lights, frequent regens, poor acceleration, and rising fuel use. DPFs require both regeneration and physical cleaning due to ash accumulation. Sensors are vital—if they fail, the whole system can suffer. Proactive maintenance and driver training are your best defense. What …

This guide covers everything you need to know about aftermarket semi truck manifolds, alongside useful information about the various manifold brands we sell. After reading, you'll be able to accurately diagnose a leak, choose between a stock replacement or a high-flow ceramic upgrade, and ensure you get the exact fitment for your engine block and chassis. How Exhaust Manifolds Work (Quick Recap) The manifold funnels the hot fumes from the engine’s cylinder head into a single, high-powered …