Cummins ISX & X15 T6 Exhaust Manifold Bolt & Spacer Kit

Installing an aftermarket T6 exhaust manifold on your Cummins ISX or X15? This complete hardware kit takes the guesswork out of the installation by including the correct bolts and spacers specifically required for non-VGT T6 manifold applications.

Unlike the factory VGT manifold, a T6 manifold positions the turbocharger lower on the engine. Because of this design, the two manifold mounting locations directly beneath the turbo flange require shorter hardware than the remaining ten locations.

This kit includes the proper combination of hardware so you don't have to source individual pieces or discover halfway through the job that the factory hardware doesn't fit.

Kit Includes

• 12 Exhaust Manifold Bolts
  • 10 Standard-Length Bolts
  • 2 Short Bolts (for the mounting holes beneath the T6 turbo flange)
• 12 Exhaust Manifold Spacers
  • 10 Standard-Length Spacers
  • 2 Short Spacers (for the mounting holes beneath the T6 turbo flange)

Features

• Complete bolt and spacer kit for aftermarket T6 exhaust manifolds
• Designed specifically for non-VGT Cummins ISX and X15 engines
• Includes the correct combination of 10 long and 2 short bolts and spacers
• Eliminates the need to reuse worn or corroded hardware
• Helps ensure proper manifold alignment and clamping force
• Heavy-duty hardware built for high-temperature diesel applications

Fits

• Cummins ISX CM870
• Cummins ISX CM871
• Cummins ISX CM2250
• Cummins ISX CM2350
• Cummins X15
• Aftermarket T6 flange exhaust manifold applications only

Important Fitment Information

This kit is designed exclusively for non-VGT T6 exhaust manifold applications.

Because the T6 turbo mounting flange sits lower than the factory VGT manifold, the two manifold mounting locations directly beneath the turbocharger require shorter bolts and shorter spacers. Standard OEM VGT hardware kits do not account for this difference and may result in improper clamping or excessive bolt engagement.

This kit includes:

• 10 standard-length bolts
• 2 short bolts
• 10 standard-length spacers
• 2 short spacers

Everything is matched specifically for T6 manifold installations, ensuring a proper fit without modification.

Why Replace the Hardware?

Exhaust manifold hardware is exposed to constant heat cycles, vibration, and corrosion. Reusing old bolts and spacers can lead to inaccurate torque readings, uneven manifold clamping, broken hardware, and exhaust leaks.

Installing fresh hardware during your T6 conversion helps ensure the manifold seats evenly against the cylinder head while providing the correct clamping force at every mounting location.

Whether you're upgrading to a fixed-geometry turbocharger, replacing a cracked manifold, or building a high-performance ISX or X15, this complete hardware kit gives you everything needed to complete the installation with confidence.