Billet Valve Cover and Catch Can: The Cummins Top-End Combo
A billet valve cover and a catch can are the two upgrades that clean up the top of your Cummins, one for looks and ports, one...
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Tech guides
Diesel tech guides
What fails on Cummins, Power Stroke and Duramax trucks, why it happens, and the part that fixes it. Written by the people who do the work.
26 guides
The Banks Monster-Ram: Fixing the Factory Intake Restriction
The factory intake plenum on the Cummins chokes airflow and feeds the cylinders unevenly. Here is what the Banks Monster-Ram changes, and every model by year,...
Read the guideL5P Duramax CP4 Failure and the CP3 Conversion That Fixes It
The 2017 and up L5P Duramax runs a CP4.2 pump that can grenade and take the whole fuel system with it. Here is the CP3 conversion...
Read the guideWhy Your Cummins Needs a FASS Lift Pump, and How to Pick One
The factory in-tank lift pump is the weak link feeding your injection pump. Here is what a FASS system actually does and how to size one...
Read the guide6.0 Power Stroke Hot Start Problem, and the Starter That Fixes It
If your 6.0 cranks slow when it is hot, the factory starter is heat soaking. Here is why it happens and the gear reduction starter that...
Read the guideBillet Valve Covers for the Cummins: Function and Looks
A billet valve cover is not just for the photos. Here is what it actually does for a built Cummins and the options we run, from...
Read the guideDuramax LML CP4 Failure and the CP3 Conversion That Fixes It
The 2011 to 2016 LML Duramax runs the same problem CP4 pump as the Ford. Here is why owners convert back to a CP3 and what...
Read the guideFord 6.7 Power Stroke CP4 Conversion: The Permanent Fix
A bypass kit limits the damage when a CP4 fails. A pump conversion removes the CP4 entirely. Here is the difference and when to step up...
Read the guideTurbo Drain Kits Explained: Sizing, AN Lines, and Doing It Yourself
A turbo needs to drain oil as fast as it feeds it. Here is how turbo drains work, why AN line beats the factory setup, and...
Read the guideCrankcase Blow-By and Why Your Cummins Needs a Catch Can
The factory crankcase vent dumps oil and vapor right back into your intake. Here is what that does over time and the catch can kit that...
Read the guideBroken Exhaust Manifold Bolts on the Cummins, and How to Stop It
Snapped exhaust manifold bolts are a classic Cummins headache. Here is why the factory bolts let go and the stainless stud kit that fixes it for...
Read the guideThe Plastic Coolant Pipe That Cracks on Every Cummins (Single and Dual Radiator)
The factory upper coolant pipe on the 6.7 Cummins is plastic, and on the 2013 to 2015 dual radiator trucks it is a Y-pipe that cracks...
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