Cummins ISX CM870 & CM871 VGT Exhaust Manifold Installation Kit (2003–2010)

Take the guesswork out of your exhaust manifold replacement with this complete installation kit for 2003–2010 Cummins ISX CM870 and CM871 DOHC engines. Whether you're replacing a cracked manifold, servicing your turbocharger, or installing a new OEM-style manifold, this kit includes the essential gaskets and hardware needed to complete the job correctly the first time.

Instead of tracking down individual parts, you'll have everything required to reinstall the factory VGT-style exhaust manifold in one convenient package.

Kit Includes

• Exhaust Manifold Gaskets
• Turbo Mounting Gasket
• 12 Standard-Length Exhaust Manifold Bolts
• 12 Standard-Length Exhaust Manifold Spacers

Features

• Complete exhaust manifold installation kit
• Designed for factory VGT exhaust manifold applications
• Includes all major sealing components and mounting hardware
• Eliminates the need to reuse old bolts, spacers, or gaskets
• Heavy-duty hardware designed for high-temperature diesel applications
• Perfect for manifold replacement, turbo service, or preventative maintenance

Fits

• Cummins ISX CM870
• Cummins ISX CM871
• 2003–2010 DOHC ISX engines
• Factory VGT exhaust manifold applications only

Important Fitment Information

This installation kit is designed specifically for Cummins ISX CM870 and CM871 DOHC engines equipped with the factory VGT exhaust manifold.

The OEM VGT manifold uses 12 standard-length manifold bolts and 12 standard-length spacers, providing consistent clamping force across all manifold mounting locations.

If your engine has been converted to an aftermarket T6 non-VGT exhaust manifold, this is not the correct installation kit. A T6 manifold requires different hardware, including shorter bolts and spacers beneath the turbo mounting flange.

Why Replace Everything?

When replacing an exhaust manifold, it's common to focus on the manifold itself while overlooking the hardware and sealing components that have endured years of extreme heat and vibration.

Old bolts can stretch or seize, spacers can become worn or corroded, and compressed gaskets often fail to reseal properly once disturbed. Replacing these components during the repair helps ensure even clamping force, proper sealing, and long-term reliability.

With new manifold gaskets, a fresh turbo gasket, and all-new mounting hardware included, this kit saves time, eliminates unnecessary trips to the dealership, and helps you complete the repair with confidence.

Whether you're replacing a leaking manifold or performing preventative maintenance, this installation kit provides the components needed to do the job right the first time.