Diesel Performance Blog

When the turbo on your Cummins ISX15 or X15 needs attention, you have more options than simply buying the same unit back. Diesel Power Source® has engineered a full range of upgrades for the ISX15 … Continue reading: ISX15 / X15 Cummins Turbo Upgrades — The Complete Guide to Every Option

High-Flow Exhaust Manifold for the Cummins ISX15 and X15: EGR and Non-EGR Direct Replacement If your Cummins ISX15 or X15 is leaking at the manifold joints, cracking near the turbo flange, or running … Continue reading: Cummins ISX15 / X15 High-Flow Exhaust Manifold | EGR & Non-EGR

If you own a 2007.5-2018 6.7 Cummins and you’re tired of the factory VGT turbo, you have two main paths to a permanent fix: a 2nd gen swap or a 3rd gen swap. Both replace the factory VGT system … Continue reading: 2nd Gen Swap vs 3rd Gen Swap: Which Cummins Conversion Is Better in 2026?

Compound Turbos for Cummins: The Complete Guide Compound turbo systems are the single biggest upgrade you can make to a Cummins diesel engine. Not because they add the most horsepower — though t … Continue reading: Compound Turbos for Cummins: The Complete Guide

If you work on ISX15 and X15 engines long enough, you start to notice a pattern: turbo problems and manifold problems rarely arrive alone. A cracked manifold raises EGTs and starves the turbo of drive … Continue reading: HE400VG Turbo and Manifold Kit for ISX15 and X15: Why Diesel Mechanics Are Replacing Both at Once