aFe BladeRunner Exhaust Manifold

2003–2007 Dodge Ram 2500 / Ram 3500 5.9L Diesel

46-40012

Overview:

The aFe BladeRunner Exhaust Manifold is a high-performance replacement designed specifically for the 5.9L Dodge Ram 2500 and Ram 3500 diesel trucks from 2003 to 2007. Engineered to solve the common cracking issues found in the factory exhaust manifolds, this BladeRunner manifold offers superior durability and enhanced performance. Whether your OEM manifold is failing or still intact, upgrading to the BladeRunner manifold delivers improved exhaust flow, reduced exhaust gas temperatures, and better throttle response for a more responsive driving experience.

Built to withstand the rigors of heavy-duty diesel applications, the BladeRunner manifold is an ideal upgrade for diesel enthusiasts seeking reliability and performance gains without compromising longevity.

Key Features:

Designed with precision and durability in mind, the BladeRunner Exhaust Manifold offers a range of advanced features that set it apart from the stock unit:

• Outflows the factory manifold by up to 23%, enhancing exhaust efficiency
• Thick wall design (0.25" vs. stock 0.15") increases strength and prevents warping or cracking
• Ported flanges ensure an excellent seal and a clean, professional appearance
• Merged runner design reduces exhaust backpressure for improved turbo spool-up
• Dual 1/8 inch NPT exhaust gas temperature (EGT) probe ports allow precise monitoring on each bank
• Reinforcing rib along the flange adds structural integrity
• Comes complete with six port gaskets and all necessary mounting hardware

Construction & Design:

The BladeRunner manifold is cast from premium 304 stainless steel, offering superior corrosion resistance and strength compared to the factory ductile iron manifold. The thicker walls and reinforced flange rib significantly reduce the risk of cracking and warping, common failure points in stock manifolds. The design incorporates merged exhaust runners that optimize flow dynamics, allowing exhaust gases to exit more efficiently and reducing backpressure. This thoughtful engineering results in a manifold that not only lasts longer but also supports better engine performance under demanding conditions.

Performance & Sound

By increasing exhaust flow by as much as 23%, the BladeRunner manifold promotes faster turbocharger spool-up, which translates to improved throttle response and overall engine performance. Lower exhaust gas temperatures help protect turbo components and improve reliability during heavy towing or extended high-load operation. While primarily focused on durability and performance, the manifold also contributes to a cleaner, more efficient exhaust pulse, enhancing the driving experience without altering the factory sound profile significantly.

Installation & Fitment:

The BladeRunner Exhaust Manifold is a direct replacement for the factory manifold on 2003–2007 Dodge Ram 2500 and Ram 3500 trucks equipped with the 5.9L diesel engine. Installation requires no modifications and includes all necessary hardware and detailed instructions to ensure a straightforward upgrade. Its ported flanges guarantee a precise fit and excellent sealing, minimizing the risk of exhaust leaks.

What's Included:

• BladeRunner Exhaust Manifold (304 stainless steel)
• Six port gaskets
• Complete mounting hardware
• Detailed installation instructions

Ideal For:

This exhaust manifold is perfect for Dodge Ram 2500 and 3500 owners who want to eliminate the common cracking issues of the stock manifold while gaining improved performance and reliability. It is especially suited for diesel enthusiasts who tow heavy loads, drive in demanding conditions, or simply want to upgrade their truck’s exhaust efficiency and throttle response without extensive modifications.

aFe POWER (Advanced FLOW Engineering) offers dyno-proven intake, filtration, and exhaust upgrades aimed at measurable performance gains. The brand’s lineup is geared toward enthusiasts looking for better airflow, improved sound, and durable materials—from cold air intakes to stainless exhaust systems for street and track applications.