At Stage 2 power on most platforms, the factory fuel system components are adequate. At Stage 3 — compound turbo, big injectors, high-fueling competition tune — the factory components become the bottleneck. That's when the conversation shifts to Industrial Injection.
Industrial Injection has been making diesel fuel system components for over 30 years — upgraded injectors, CP3 high-pressure injection pumps, compound turbo manifolds, and the hardware that connects those systems together. Their injectors are built from new OEM cores, not cores pulled from the field, which matters for consistency and longevity on a build designed to run hard.
We stock and install Industrial Injection injectors as our preferred upgrade path on Cummins and Duramax Stage 3 builds. On Cummins trucks going into CP3 conversion territory — 2019+ Ram 2500/3500 with a factory CP4 — Industrial Injection CP3 kits are what we run. On Duramax compound builds, their turbo manifolds and compound hardware is the foundation of the turbo system.
The brand isn't a preference — it's a product line that fits the builds we do. If you're asking what injectors go in your compound Cummins, the answer is Industrial Injection. See the fuel system upgrades page for where II components fit in the full fuel system build path.
The II product lines we carry and install on Houston diesel builds — listed by what they do, not by catalog number.
Which II products apply to each diesel platform — matched to the build stage where they make sense.
Questions about II components, injector sizing, and how they fit into the build process.
Tell us your platform, power target, and turbo configuration. We'll spec the II components that match — and tune to them.
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