Not Just Like New.
Better Than New.
JAK'S Dominator EUI injectors are remanufactured the way an electromechanical part should be — mechanically and electronically rebuilt, tested and dyno-verified to the tightest spray variance in the industry. So your CAT runs cleaner, pulls harder and lasts longer.
SN 2756 · 10R1000 · 1260832-4
Dominator Series · Laser-serialized & traceable
Spray Variance Kills Performance
On a big CAT, weak power, high fuel burn and short engine life all trace back to tired injectors. The catch: most reman EUIs can swing 20% or more from one injector to the next — and still get called "acceptable."
We don't build to "acceptable." Every JAK'S Dominator injector is matched to a near-zero spray window, so all six fire the same. The result is the lowest variance and highest consistency you can buy.
Four Reasons They Run Better Than New
Every Dominator injector is torn down, rebuilt with premium materials and proven on the dyno before it ships. Here's what goes into the build.
Superior Components
Hand-selected suppliers and premium materials — Viton, SAE 4130 and chromium-silicon alloy springs — for performance and life the cheap rebuilds can't touch.
Advanced Manufacturing
Built in a cleanroom-grade facility to meet or exceed OEM, SAE and ASTM specs. Single-piece flow and laser serialization tie every unit to its build date and technician.
Precision Calibration
Every injector is flow-bench matched and dyno-tested so all six fire identically. Nozzles are reground and honed, then calibrated to its own optimized trim codes for a running engine.
Quality Assurance
Every injector passes a full battery of mechanical and electronic tests before it leaves the shop. Fail any portion of testing and it does not ship.
Laser-etched cap · 10R1000 · 1260832-4
Inspected Two Ways, Mechanical & Electronic
An EUI isn't just a nozzle — it's a precision electromechanical assembly. Most rebuilders only test one half of it. We rebuild and verify both, so the part performs the same on the bench as it does in your block.
Find Your Engine
Same rebuild standard across both lines. Tell us your engine and we'll cross your injector number by hand.
Matched Set
A Complete, Matched Set of 6
So much engineering goes into matching these injectors that we only sell them in complete sets — never mix a fresh Dominator with a tired injector and let contamination or variance creep back in.
JAK'S Dominator vs. The Rest
Same core, very different build. Here's what separates a Dominator injector from a "good enough" rebuild.
JAK'S Dominator Reman EUI |
CAT® OE New / factory reman |
Other Reman Typical aftermarket |
|
|---|---|---|---|
| Spray variance | Under 2% | Up to 10% | Up to 15% |
| New components | Up to 80% | Varies | Often under 50% |
| Critical springs | 100% new | New | Reused / minimal |
| Nozzle finish | Reground & honed, crack-inspected | New | Often black-oxide to hide flaws |
| Flow-bench matched set | All 6 matched | — | — |
| Field failure rate | Under 0.05% | Varies | Varies |
| Dyno + electronic test | Basic pass / fail | ||
| OEM trim codes | On USB dongle | — | |
| Laser-serialized & traceable | — | ||
| Hold-down bolt included | — | — |
Not Sure Which Injector You Need?
Give a JAK'S specialist your engine and injector number — they'll cross it by hand and spec the right set.