
Caterpillar Inc. introduces the Cat C3.4B, C4.4 ACERT and C6.6 ACERT, the three latest additions to the Cat Tier 4 Interim/Stage IIIB technology industrial engine line up.
- C3.4B offers ratings from 60 to 115 bhp, high torque up to 310 lb.-ft. common rail fuel injection system, smart waste-gated turbocharger, aftercooler
- C4.4 ACERT provides 80 to 174 bhp, 4.4 liter, four-cylinder, 22% increase in power to 174 hp, single or series turbocharger, torque up to 553 lb.-ft.
- C6.6 ACERT is a 6.6 liter platform delivering 120 to 174 bhp, peak torque of up to 609 lb.-ft. at low engine speedA vent that will fit your tank to help you meet EPA requirements
Fill out the form below to request more information about Tier 4 Interim/Stage IIIB Engines














![Lee Boy Facility 2025 17 Use[16]](https://p1-cms-assets.imgix.net/mindful/acbm/workspaces/default/uploads/2025/09/leeboy-facility-2025-17-use16.AbONDzEzbV.jpg?ar=16%3A9&auto=format%2Ccompress&fit=crop&h=135&q=70&w=240)
