Cummins Exhaust Manifold Half Side 3937630 for 6B B5.9 ISB 6.7L B6.7

The Cummins Exhaust Manifold Half Side (Part Number 3937630) is a precision-engineered exhaust component designed for Cummins 6B, B5.9, ISB 6.7L, and B6.7 diesel engines. This half-section manifold channels exhaust gases efficiently from the cylinder head to the turbocharger, ensuring optimal exhaust flow and consistent engine performance.

Manufactured to OEM specifications, the 3937630 exhaust manifold half is constructed from high-strength cast material to withstand extreme exhaust temperatures, pressure fluctuations, and continuous heavy-duty operation. Its robust design helps prevent cracking, warping, and exhaust leaks that can negatively impact turbo response and engine efficiency.

A damaged or leaking exhaust manifold can cause power loss, excessive noise, increased exhaust temperatures, and reduced turbocharger efficiency. Replacing it with the Cummins 3937630 exhaust manifold half side restores proper exhaust sealing, improves turbo spool-up, and supports long-term engine reliability. This component is ideal for engine rebuilds, repairs, and preventive maintenance in both on-highway and off-highway applications.

✔ PRODUCT FEATURES & COMPONENTS

• Exhaust manifold half side assembly

• Cummins part number: 3937630

• OEM-grade cast construction

• Designed to handle high exhaust temperatures

• Resistant to cracking and warping

• Precision-machined sealing surfaces

• Direct-fit replacement for compatible engines

• Supports efficient turbocharger operation

✅ ENGINE COMPATIBILITY

• Cummins 6B

• Cummins B5.9

• Cummins ISB 6.7L

• Cummins B6.7

✅ VEHICLE & EQUIPMENT APPLICATIONS

• Commercial trucks and buses

• Construction and industrial equipment

• Agricultural machinery

• Generator sets and power units

• Fleet vehicles using Cummins B-series engines

✅ KEY FEATURES & BENEFITS

• Restores proper exhaust gas flow

• Improves turbocharger efficiency and response

• Reduces exhaust leaks and noise

• OEM-quality fit and durability

• Designed for heavy-duty diesel applications