4003994X Exhaust Manifold (MANIFOLD,EXHAUST) is a key exhaust assembly matched for CUMMINS series diesel engines. It collects exhaust gas exhausted from each cylinder, converges and guides exhaust gas to turbocharger and post-processing system to realize exhaust circulation.
This exhaust manifold solves common failures including manifold cracking, exhaust leakage, power reduction and abnormal noise caused by thermal fatigue deformation and aging of old manifolds.
Core Product Advantages
High Temperature Resistant Casting Material
Heat-resistant cast raw material features excellent thermal fatigue resistance, withstand long-term erosion of high-temperature exhaust gas, avoid cracking under frequent cold and hot alternating environment.
Optimized Internal Flow Channel Design
Smooth inner runner reduces exhaust resistance, improves exhaust efficiency and maintains stable engine power performance.
Precisely Machined Sealing Flange
Flat connecting surface fits tightly with cylinder head and sealing gasket, preventing exhaust blow-by and gas leakage.
Reinforced Structure Layout
Reasonable rib reinforcement disperses thermal stress, reduces warping and fracture risk under continuous heavy-duty operation.
Good Anti-Oxidation Performance
Resist corrosion of high-temperature waste gas and slow surface oxidation and carbon accumulation.
Standard Matching Specification
Dimension 25cm25cm14cm, weight 2.109KG, perfectly fit supporting CUMMINS engine assembly, direct replacement without secondary machining.
Strict Factory Quality Inspection
All exhaust manifolds pass dimension inspection, defect detection and assembly test, stable batch quality for engine overhaul factories and engineering fleets bulk procurement.
Basic Product Parameters
Part Number: 4003994X
English Name: MANIFOLD, EXHAUST
Product Name: Exhaust Manifold / Exhaust Header
Applicable: For CUMMINS Series Diesel Engines
Overall Dimension: 25cm 25cm 14cm
Product Weight: 2.109KG
Core Function: Collect exhaust gas of each cylinder and transport to turbocharger and exhaust aftertreatment system
Key Features: Heat resistant, anti-crack, low exhaust resistance, leak-proof, stable structure
Installation Position: Exhaust outlet of engine cylinder head
Package: Thick export carton with shockproof filler, avoid flange collision and deformation during transit
Application Scenarios
Suitable for heavy-duty trucks, construction machinery, mining vehicles and diesel generator sets equipped with CUMMINS diesel engines. Adapt to long-distance full-load transportation and high-intensity continuous operation. After replacement, it eliminates abnormal noise caused by exhaust leakage and restores engine power performance.
Purchase Reminder
Please confirm part number 4003994X and corresponding CUMMINS engine model before ordering to ensure complete compatibility. We support global bulk wholesale for auto parts distributors, engine overhaul workshops and transport fleets with sufficient stock and competitive prices. Gasket installation and bolt torque guidance will be offered after purchase.
