Cummins ISX15 / QSX15 / X15 Torque Lock Injector Cup Kit - Torque Lock Injector Cup Complete Kit - Industrial Injection - C45602

Cummins ISX15/QSX15/X15 Torque Lock Injector Cup Kit

Permanent Solution to Fuel and Coolant Cross-Contamination

The Industrial Injection Torque Lock Injector Cup Kit is the proven solution for one of the most common failures on Cummins ISX15, QSX15, and X15 engines: leaking press-fit injector cups.

If you’re dealing with coolant in fuel on your Cummins ISX15, the root cause is often a loose factory press-fit injector cup. This kit provides a permanent fix by replacing the OEM sleeve with a threaded billet injector cup design.

Key Features and Benefits

Direct Fit for Cummins ISX/QSX/X15 Engines

Fits 2010-2016 ISX15 and QSX15 Single Overhead Cam

Fits 2017-2026 Cummins X15

Patented Billet Construction (Patent #11,519,371) - machined from premium materials in the USA.

Thread-In Torque Lock Design - prevents cups from ever loosening, unlike factory press-fit style.

Dual Oversized Silicone O-Rings - each twice the size of OEM seals, allowing proper expansion/contraction while maintaining a leak-free seal.

Complete Installation Kit - includes taps, removal tools, nozzle bore plugs, o-rings, and torque lock tool for a professional installation.

Made in the USA - engineered, manufactured, and tested to exceed OEM durability.

Why Choose Industrial Injection’s Torque Lock Kit?

Eliminates fuel and coolant mixing issues permanently.

Saves thousands in potential engine repairs and downtime.

Designed for reliability in heavy-duty fleet, vocational, and on-highway applications.

Trusted by professional diesel shops worldwide.

What’s Included

Factory injector cup tap and centering sleeve

Cylinder head tap

Injector cup removal tool

Torque lock cup installation tool

6 Torque Lock billet injector cups

6 nozzle bore plugs and 12 o-rings

12 injector cup o-rings

Installation Resources

Industrial Injection provides complete step-by-step installation instructions for this kit. If you’re not comfortable with injector cup removal and head tapping, we recommend professional installation at a qualified diesel machine shop.

⤵️ Download Installation Instructions »