BD DIESEL 1045989 MANIFOLD EXHAUST PULSE MOTORHOME W/CUMMINS 5.9L 12-VALVE

Product Description

The BD DIESEL 1045989 Pulse Exhaust Manifold is a heavy-duty performance and reliability upgrade for motorhomes equipped with the Cummins 5.9L 12-valve diesel. Built as a true drop-in replacement, this fully divided pulse-style manifold improves exhaust flow efficiency for quicker turbo response while reducing the heat stress and cracking that commonly affects factory manifolds in high-load, high-temperature motorhome applications.

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This manifold is cast from high-silicon ductile iron and engineered to withstand extreme temperatures and vibration. The precision expansion joints allow the manifold to expand and contract under heat cycles, reducing cyclic thermal fatigue that leads to warping, cracked runners, and exhaust leaks. It is also pre-drilled for pyrometer probes and includes stainless steel installation hardware for long-term clamping strength.

Fitment

• Motorhome applications with Cummins 5.9L 12-valve diesel
• Designed for stock and performance turbo setups
• Direct bolt-on replacement manifold

Key Features & Benefits

• Fully divided pulse manifold design for improved turbo response
• High-silicon ductile iron construction for extreme durability
• Expansion joints reduce cracking, warping, and exhaust leaks
• Pre-drilled for pyrometer probes
• Reduced backpressure with improved efficiency
• Includes stainless steel hardware

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

• BD DIESEL 1045982 EXHAUST MANIFOLD BOLT AND SPACER KIT – 5.9L/6.7L CUMMINS
• BD DIESEL 1045987 PULSE EXHAUST MANIFOLD – 5.9L CUMMINS (2003–2007)
• BD DIESEL 1045947 EXHAUST PULSE MANIFOLD – 5.9L CUMMINS 24-VALVE (1998.5–2002)

What does “Pulse Manifold” mean?

A pulse manifold keeps exhaust pulses separated longer to improve turbo spool-up and reduce turbulence compared to open-style manifolds.

Does this help prevent cracking and leaks?

Yes. The expansion joints allow controlled movement during heat cycles, reducing thermal fatigue that causes cracking and exhaust leaks.

Does it include hardware?

Yes. This manifold includes stainless steel installation hardware.

Specifications for BD DIESEL PRODUCTS 1045989