Diesel Performance Blog

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

The exhaust manifold on a Cummins ISX15 or X15 is one of the most stressed components on the engine. It handles exhaust temperatures that regularly exceed 1,000°F under load, expands and contracts … Continue reading: ISX15 and X15 Exhaust Manifold: EGR vs Non-EGR — Which One Does Your Truck Need?

If you own a Cummins diesel and you’ve been looking into turbo upgrades, you’ve almost certainly run into compound turbo kits. Maybe you’ve seen them in forum threads, on YouTube ins … Continue reading: Compound Turbos for Cummins: The Complete Guide (5.9 & 6.7)

The 6.7 Cummins is one of the most upgraded diesel engines on the road, and the turbo is almost always the first major upgrade owners make. Whether you’re trying to fix a failing factory VGT, dr … Continue reading: 6.7 Cummins Turbo Upgrade Guide: 4 Paths from Drop-In to 1,200+ HP

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?