aFe BladeRunner Exhaust Manifold (46-40012) improves turbo spool, reduces backpressure, and fits 2003–2007 Dodge RAM 2500/3500 5.9L Diesel Trucks. Constructed from durable ductile iron with a thick 0.25-inch wall flange, this manifold offers 23% better flow than stock, eliminating the warping and cracking issues often seen in factory units. The matched port and merged runner design enhances exhaust flow, reduces backpressure, and leads to quicker turbo response and overall performance gains. With two EGT probe ports and reinforced ribs, this one-piece unit is built for strength, durability, and optimal diesel performance.
Key Features :
Outflows stock manifolds by 23% for enhanced performance
Thick wall flange (0.25") minimizes warping and cracking
Merged runner and matched port design reduce exhaust backpressure
Quicker turbo spool-up and better throttle response
Two built-in EGT probe ports for monitoring
Made from high-strength ductile iron
CARB-compliant with EO number D-550-39
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