aFe BladeRunner Exhaust Manifold

1998–2002 Dodge Ram 2500 / Ram 3500 5.9L Diesel

Part #: 46-40034

Overview

The aFe BladeRunner Exhaust Manifold is a direct replacement designed specifically for the 1998 to 2002 Dodge Ram 2500 and Ram 3500 trucks equipped with the 5.9L diesel engine. Engineered to address the common cracking issues found in the factory exhaust manifold, this high-performance manifold offers enhanced durability and improved engine efficiency. Whether replacing a failing OEM manifold or upgrading for better performance, the BladeRunner manifold delivers longer service life, reduced exhaust gas temperatures, and quicker throttle response.

Built to endure the demands of heavy-duty diesel applications, this manifold is ideal for diesel enthusiasts, fleet operators, and professionals seeking reliable performance gains without sacrificing longevity.

Key Features

The BladeRunner Exhaust Manifold combines advanced engineering with robust materials to provide significant improvements over the stock manifold. Key features include:

• Up to 50% increased exhaust flow compared to the factory manifold, boosting exhaust efficiency
• Ported flanges for an excellent seal and a clean, professional appearance
• Thick wall construction (0.25" thickness versus stock 0.15") enhances strength and prevents warping or cracking
• Merged runner design reduces exhaust backpressure for improved flow
• Dual 1/8" NPT exhaust gas temperature (EGT) probe ports for precise monitoring on each bank
• Includes six port gaskets and all necessary mounting hardware for a complete installation
• Reinforcing rib along the flange adds structural integrity
• Machined ports ensure a precise fit and smooth airflow

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. Its thicker walls and reinforced flange design effectively address the common cracking issues seen in stock manifolds, ensuring long-lasting durability under extreme operating conditions. The exhaust runners are carefully merged and ported to maximize flow efficiency, reducing exhaust gas temperatures and turbo lag.

Every detail, from the precision port machining to the inclusion of dual EGT ports, reflects a focus on performance and reliability tailored to the demanding needs of Dodge diesel trucks.

Performance & Sound

By increasing exhaust flow by as much as 23% over the stock manifold, the BladeRunner helps your turbo spool faster, resulting in quicker throttle response and improved overall engine performance. The reduction in exhaust gas temperatures also contributes to enhanced engine longevity and efficiency. While primarily focused on performance and durability, the manifold’s design supports a clean and efficient exhaust sound characteristic of a well-tuned diesel setup.

Installation & Fitment

The BladeRunner Exhaust Manifold is a direct bolt-on replacement for 1998–2002 Dodge Ram 2500 and Ram 3500 trucks equipped with the 5.9L diesel engine. It comes complete with all necessary mounting hardware and detailed installation instructions, making the upgrade straightforward for professional installers and experienced enthusiasts alike. No modifications to the vehicle’s exhaust system are required, ensuring a hassle-free installation process.

What's Included

• BladeRunner Exhaust Manifold (304 stainless steel)
• Six port gaskets
• Complete mounting hardware kit
• 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 truck enthusiasts, fleet operators, and anyone seeking a durable upgrade that enhances turbo response and reduces exhaust gas temperatures under heavy load conditions.

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.