| Model | D40LF |
| Fleet Numbers- | 5713-5830/5851-5950 (2004), 8000-8119 (2005) |
| Status | Active |
| Width (Inches) | 102″ |
| Length (feet) | 40′ |
| Height | 120 Inches |
| Curb Weight/ Gross Weight | 27,615 Pounds 37,920 Pounds |
| Delivery Date | March 2004-October 2004/ August 2005-Janurary 2006 |
| Chassis“ | Steel |
| Seating Capacity | 39 Seats/ 15 Standees |
| Engine Model | Detroit Diesel 50 (1), Cummins ISL |
| Transmission | ZF Ecomat-II 6HP-592 |
| Brakes | Air |
| Maximum Power | 275 HP/ 280 HP |
| Livery | SEPTA Fade Away Scheme |
| Axle | Man Axle |
| Features | Announcement System, GPS/AVL System, Interior LED designation sign |
| Destination Equipment- | Twinvision All-LED |
| A/C | Themoking |
| NOTES | Overhauled in 2009-2012.(1) The 2004 D40LFs originally arrived with the Detroit Diesel 50 EGR. By 2011, all 2004 New Flyers has been retrofitted with the Cummins ISL engine. |
| Tires | Goodyear |