CENTRI® Air Precleaners

Diesel Engine Guide — Normally Aspirated

  • Determine engine displacement in Cubic Inch Displacement (CID) or Liters, and if the engine is Turbocharged, Turbocharged Aftercooled or Normally Aspirated
  • Check that this is appropriate chart for your engine type. If you are unsure whether the engine is Turbocharged, Turbocharged Intercooled, or Normally Aspirated, please consult the manufacturer's specification sheet for the engine
  • Locate proper operating RPMs at the top of the columns. Then move down the column to the proper CID/Liters
  • Move across proper CID row to the column, labeled CENTRI® Model. The number in this column will be the CENTRI® Air Precleaner required for the engine
  • After selecting the proper CENTRI® unit, measure the O.D. of the air intake. If this size is larger or smaller than the CENTRI® unit, refer to the accessory pages for the adaptor required for installation. CENTRI® unit dimensions can be found on the main product page under specifications
  • Choose the precleaner size by engine air flow requirements, not intake diameter
  • If you do not find your engine here, please e-mail us at info@smartmaintenance.com or call 877-368-4766
2400 RPM 2200 RPM 2100 RPM 2000 RPM 1800 RPM
LTR CID CFM CENTRI®
MODEL
CFM CENTRI®
MODEL
CFM CENTRI®
MODEL
CFM CENTRI®
MODEL
CFM CENTRI®
MODEL
1.5 92 54 EX-20 50 EX-20 47 EX-20 45 EX-20 41 EX-20
2.0 122 72 EX-20 66 EX-20 63 EX-20 60 EX-20 54 EX-20
2.5 153 90 EX-20 83 EX-20 79 EX-20 75 EX-20 68 EX-20
3.0 183 108 EX-25 99 EX-20 95 EX-20 90 EX-20 81 EX-20
3.5 214 126 EX-25 116 EX-25 110 EX-25 105 EX-25 95 EX-20
4.0 244 144 EX-25 132 EX-25 126 EX-25 120 EX-25 108 EX-25
4.5 275 162 EX-25 149 EX-25 142 EX-25 135 EX-25 122 EX-25
5.0 305 180 EX-25 165 EX-25 158 EX-25 150 EX-25 135 EX-25
5.5 336 198 EX-40 182 EX-25 173 EX-25 165 EX-25 149 EX-25
6.0 366 216 EX-40 198 EX-25 189 EX-25 180 EX-25 162 EX-25
6.5 397 234 EX-40 215 EX-40 205 EX-40 195 EX-25 176 EX-25
7.0 427 252 EX-40 231 EX-40 221 EX-40 210 EX-40 189 EX-25
7.5 458 270 EX-40 248 EX-40 236 EX-40 225 EX-40 203 EX-40
8.0 488 288 EX-40 264 EX-40 252 EX-40 240 EX-40 216 EX-40
8.5 519 306 EX-40 281 EX-40 268 EX-40 255 EX-40 230 EX-40
9.0 549 324 EX-40 297 EX-40 284 EX-40 270 EX-40 243 EX-40
9.5 580 342 EX-40 314 EX-40 299 EX-40 285 EX-40 257 EX-40
10.0 610 360 EX-40 330 EX-40 315 EX-40 300 EX-40 270 EX-40
10.5 641 378 EX-40 347 EX-40 331 EX-40 315 EX-40 284 EX-40
11.0 671 396 EX-40 363 EX-40 347 EX-40 330 EX-40 297 EX-40
11.5 702 414 EX-50 380 EX-40 362 EX-40 345 EX-40 311 EX-40
12.0 732 432 EX-50 396 EX-40 378 EX-40 360 EX-40 324 EX-40