aFe BladeRunner Exhaust Manifold

1998–2002 Dodge Ram 2500 / Ram 3500 L6-5.9L

46-40032

Overview:

The aFe BladeRunner Exhaust Manifold is a high-quality replacement designed specifically for the 1998 to 2002 Dodge Ram 2500 and Ram 3500 equipped with the 5.9L inline-six engine. Engineered to outperform the factory exhaust manifold, this component enhances exhaust flow and throttle response, making it an excellent upgrade for enthusiasts seeking improved engine efficiency and durability. It offers a reliable, cost-effective solution for those looking to maintain or boost their truck’s performance without extensive modifications.

Built to meet the demands of heavy-duty use, the BladeRunner manifold is ideal for truck owners who want to maximize their vehicle’s power output while ensuring long-term reliability and ease of installation.

Key Features:

This exhaust manifold incorporates advanced design and construction features to deliver superior performance and durability:

• Outflows the factory exhaust manifold by 50%, significantly improving engine performance and throttle response.
• Constructed from cast ductile iron, providing excellent strength and durability as a direct stock replacement.
• Thick wall flange design enhances structural integrity, preventing warping and cracking under high heat and stress.
• Matched ports and merged runner design reduce exhaust backpressure, maximizing exhaust gas flow for better efficiency.
• Equipped with dual 1/8" NPT exhaust gas temperature (EGT) ports for easy installation of gauges or testing equipment.
• One-piece construction with a reinforcing rib between wall flanges ensures maximum strength and longevity.
• Includes all necessary hardware for a hassle-free installation process.

Construction & Design:

The BladeRunner Exhaust Manifold is expertly crafted from cast ductile iron, a material known for its superior strength and resistance to thermal stress compared to standard cast iron. This robust construction ensures the manifold withstands the high temperatures and pressures generated by the 5.9L inline-six engine during heavy-duty operation.

The manifold features a thick wall flange design that prevents common issues such as warping and cracking, which can occur with prolonged exposure to heat cycles. Additionally, the matched port and merged runner layout optimizes exhaust flow by minimizing turbulence and backpressure, contributing to improved engine breathing and efficiency.

A reinforcing rib between the wall flanges adds structural rigidity, further enhancing the manifold’s durability and lifespan under demanding conditions.

Performance & Sound

By increasing exhaust flow by up to 50% over the factory manifold, the aFe BladeRunner Exhaust Manifold improves throttle response and overall engine performance. The reduction in exhaust backpressure allows the engine to expel gases more efficiently, which can lead to smoother power delivery and potentially improved fuel economy under load.

While primarily focused on performance, this manifold also contributes to a cleaner exhaust pulse, which can subtly enhance the exhaust note without adding excessive noise or drone.

Installation & Fitment:

The BladeRunner manifold is designed as a direct replacement for the factory exhaust manifold on 1998–2002 Dodge Ram 2500 and Ram 3500 trucks with the 5.9L inline-six engine. Installation is straightforward and requires no modifications to the engine or exhaust system.

All necessary mounting hardware is included to ensure a smooth, hassle-free installation. However, gaskets are not included and should be sourced separately to complete the installation.

What's Included:

• Cast ductile iron exhaust manifold
• Dual 1/8" NPT EGT ports
• Complete installation hardware

Ideal For:

This exhaust manifold is perfect for Dodge Ram 2500 and Ram 3500 owners from model years 1998 through 2002 who want a durable, performance-oriented upgrade. It suits daily drivers, work trucks, and enthusiasts looking to improve throttle response and exhaust flow without extensive engine modifications.

Emissions Note

This product is not CARB exempt and is not legal for sale or use on vehicles registered in California or states that enforce California emissions standards.

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.