aFe Power BladeRunner Ductile Iron Exhaust Manifold for 2003-2007 Dodge Ram 2500/3500 (L6-5.9L) 46-40012

Fits 2003-2007 Dodge Ram 2500 and 3500 (L6-5.9L).

Replace your prone-to-cracking factory exhaust manifold with the aFe Power BladeRunner ductile iron manifold. Engineered for durability and high-volume flow, this manifold features a heavy-duty 0.25" wall thickness—significantly thicker than the 0.15" factory casting—to eliminate the warping and cracking common in high-heat diesel applications. The merged runner design and matched ports reduce backpressure and optimize exhaust gas velocity, resulting in a 23% increase in flow over the OE manifold.

This performance manifold is designed with dual 1/8" NPT exhaust gas temperature (EGT) ports for easy gauge integration. The ported flanges provide a superior seal against the cylinder head, ensuring a leak-free installation and helping to decrease turbo spool-up times while improving throttle response.

• Outflows factory manifold by 23% for improved performance
• Ductile iron construction with 0.25" thick wall design to prevent cracking
• Merged runner design reduces exhaust backpressure
• Includes dual 1/8" NPT EGT ports for monitoring
• Includes six port gaskets and all necessary hardware
• Manufacturer Part Number: 46-40012