Coolant Bypass Kit — Dodge Ram Cummins 5.9L & 6.7L (2003–2024)
Short Description
Aluminum coolant bypass kit to improve rear-cylinder cooling on Cummins 5.9L and 6.7L Ram engines. Lowers rear-cylinder coolant temps, evens cylinder temperatures, and prevents damaging coolant-pressure buildup. Includes braided hose and AN O‑ring fittings for a leak‑free installation.
Key Benefits
- Lowers coolant temperature at rear cylinders
- Promotes consistent temperatures across all cylinders
- Prevents damaging coolant pressure build-up
- Improves reliability and longevity of the Cummins platform
Fitment
- 2003–2007 5.9L Ram (manual transmission only)
- 2007.5–2024 6.7L Ram (manual & automatic transmissions)
Construction & Materials
- High-quality aluminum, metal fittings, and polyester-reinforced braided hose
- AN O-ring fittings for secure, leak-free connections
Features
- Addresses known low-flow/rear-cylinder overheating on 6.7L models
- Includes braided hose and AN O‑ring fittings for durable, sealed hookup
- Simple install; recommended upgrade for rebuilt or high-output engines
Contents
- Aluminum bypass assembly
- Braided coolant hose(s)
- AN O‑ring fittings and necessary hardware
- Installation instructions
Notes & Recommendations
- Professional installation recommended.
- Verify fitment and routing for cab/chassis variations and accessory layouts prior to installation.