Low Cab Forward (LCF) Models
- **NPR and NQR; W35/3500, W4, W45/4500, and W55/5500; Front**
- **NRR and 5500XD (2005-2022); Front**
- Includes stripped and Flatlow low-profile chassis.
NPR (Isuzu) and W4 (Chevrolet/GMC) 1986-1995
- Through June 1995 for diesel engines; through September 1995 for gas engines.
- Springs used until December 1988 utilized a 6mm pad instead of the sway bar bracket.
- Dayton uses the sway bar bracket on all these springs.