Soft Caterpillar 1925339-01, rating 500HP@1800rpm; 1849LB-FT@1200rpm; 500HP@2100rpm; 1849LB-FT@1200rpm. 1998 MY, 500HP 1850lb-ft | | 2300 RPM HIIDLE | | Low NOx Kit Software | | SOFTWARE DATE CODE: Apr00 | | INTERLOCK CODE: 441 | | Rating#1: | | 500HP@1800rpm, | | 1849LB-F