BD DIESEL 1045995-T4 CUMMINS 20-DEGREE T4 EXHAUST MANIFOLD DODGE RAM 1998.5–2007 5.9L

Product Description

The BD DIESEL 1045995-T4 20-Degree T4 Exhaust Manifold is a heavy-duty performance replacement manifold for 1998.5–2007 Dodge Ram 2500/3500 5.9L Cummins trucks designed for use with T4 turbochargers. If you're upgrading from a stock turbo to a larger T4-frame unit while keeping the turbo in the factory location, this manifold is built to support higher airflow, improved spool response, and long-term durability.

BD Diesel 1045995-T4, 5.9 Cummins T4 manifold, 20 degree T4 exhaust manifold, divided pulse manifold, turbo upgrade manifold, Dodge Ram Cummins exhaust manifold upgrade, high-silicon ductile iron exhaust manifold

This fully divided pulse manifold is cast from high-silicon ductile iron to withstand extreme exhaust temperatures and vibration. The multi-piece design with expansion joints allows controlled movement as the manifold heats and cools, helping prevent cracking, warping, and gasket failures that are common with one-piece manifolds. The optimized 20-degree T4 flange angle improves turbocharger positioning for common performance turbo configurations while maintaining fitment in the engine bay.

Fitment

• 1998.5–2007 Dodge Ram 2500 / 3500
• 5.9L Cummins Diesel Engine
• T4 turbocharger mount (competition/performance turbo installations)
• Designed to keep turbo in the stock location (modifications may be required depending on turbo configuration)

Key Features & Benefits

• 20-degree T4 flange angle for improved turbo placement
• Fully divided pulse manifold for improved exhaust energy and response
• High-silicon ductile iron construction for extreme durability
• Expansion joints help prevent cracking and exhaust leaks
• Improved airflow compared to restrictive factory manifolds
• Ideal for performance turbo swaps using a T4 mount

Cross-Reference & Compatible BD Diesel Products (BD DIESEL ONLY)

• BD DIESEL 1045987-T4 EXHAUST MANIFOLD W/T4 FLANGE – 2003–2007 5.9L CUMMINS
• BD DIESEL 1045986-T4 EXHAUST MANIFOLD GASKET KIT – 98.5–2018 CUMMINS
• BD DIESEL 1045982 EXHAUST MANIFOLD BOLT & SPACER HARDWARE KIT – 98.5–2018 CUMMINS

Will this work with an S300 or S400 turbo?

This manifold is designed for T4 turbo installations and is commonly used for performance turbo swaps including S300 and S400 style turbochargers depending on your housing and piping setup.

Does this include gaskets or mounting hardware?

No. Gaskets, bolts, and spacer kits are typically purchased separately. See the BD Diesel gasket kit and bolt/spacer hardware kit listed above.

Is this a stock replacement manifold?

This is a performance-oriented replacement manifold designed to support T4 turbo upgrades. Some modifications to vehicle and engine components may be required depending on turbo choice and configuration.

Specifications for BD DIESEL PRODUCTS 1045995-T4