Parts people, not a drop-ship storefront
DIAMOND-AUTO supplies turbochargers, VGT actuators and diesel fuel components to repair shops, fleets and enthusiasts. Our catalog is built around the engines that actually break: Cummins ISB, ISC and ISX, Holset HE300/HE400/HE500, Ford 6.0/6.7 PowerStroke, Duramax, PACCAR MX-13 and the agricultural / construction units that keep working when a dealer part is three weeks out.
What we do differently
- Every unit is cross-referenced. We match OEM numbers, housing codes and actuator calibration IDs before a part goes on the site.
- We test what we ship. Actuators are electronically cycled; turbos are flow-checked and balanced. Defective rate is measured, not guessed.
- We answer fitment questions. Send the tag photo from your old unit — that is faster than any vehicle selector.
- No core games. New units ship with no core deposit and no return paperwork.
Warranty and support
Turbochargers and electronic VGT actuators carry a 2-year (24-month) warranty against manufacturing defects. All other parts — compressor and turbine wheels, housings, CHRA cartridges, repair kits, nozzle rings, injectors and sensors — carry a 6-month warranty. If a part fails within its window we replace it; you cover return shipping only if the unit shows signs of installation damage, contamination or over-boost.
Trade & fleet accounts
If you buy five or more units a quarter, ask for a trade price list and net-30 terms. Get in touch.