Cummins 6.7 Polar DPF-Back Exhaust Installation Guide
Off-road / competition use only where emissions rules apply. Emissions-related deletes and DPF-off configurations are not for vehicles operated on public roads or highways subject to those regulations. Confirm local laws before purchase or install. Not legal advice.
This page is Polar Diesel’s HTML overview for installing Cummins 6.7 Polar DPF-back exhaust (2019–2026 PDF). DPF-back is not the same as a full delete exhaust—use the matching full-exhaust year-split lander/PDF when that is your kit. Confirm fitment on the product page, then follow the official DPF-back PDF.
Download official Cummins 6.7 DPF-back exhaust PDF
← All Polar Diesel install guides (QR / instructions hub)
High-level steps
- Confirm year and that you have a DPF-back (not full delete) kit.
- Read the Polar Cummins 6.7 DPF-back PDF end-to-end.
- Support the vehicle safely; allow the exhaust to cool completely.
- Install Polar DPF-back sections per PDF order and orientation.
- Check clearances/clamps and road-test for leaks/rattles where permitted.