FITMENT
- 2009–2019 6.7L Ram Cummins 2500 / 3500 Turbo Diesel (Pickup).
- 2009–2019 6.7L Ram Cummins 3500 / 4500 / 5500 Turbo Diesel (Cab & Chassis).
DESCRIPTION
Product Overview
- Demanding loads and heavy towing push your 6.7L Cummins engine's cooling system to its limits, creating excessive heat buildup toward the back of the engine block. Because cylinders #5 and #6 bear the highest thermal load, restricted factory coolant flow can compromise cooling efficiency and long-term durability.
- This 6.7L Cummins Coolant Bypass Upgrade delivers an active secondary flow path to eliminate rear-engine heat concentration. By promoting balanced, consistent coolant circulation throughout the entire block, it lowers thermal stress, enhances cooling system reliability, and keeps your truck running strong under heavy work.
Key Features
- Aerospace-grade billet aluminum, CNC-machined to precise tolerances — resists warping, cracking, and coolant leaks even under extreme engine compartment heat
- Replaces brittle, leak-prone factory plastic adapters with a permanent metallic upgrade that won’t degrade from heat cycling or vibration
- Supports rear cylinder cooling by enabling a proper coolant bypass circuit that reduces heat concentration around cylinders #5 and #6
- Corrosion and rust resistant for long service life, with excellent heat dissipation properties for sustained heavy-duty operation
FAQ
Q: Why does my 6.7L Cummins need this coolant bypass barb adapter?
A: The factory plastic coolant fittings are prone to developing leaks as heat cycles and vibration take their toll. This billet aluminum adapter gives you a permanently sealed connection that won’t crack, warp, or deteriorate, eliminating one of the most common coolant leak sources on these engines.
Q: What problem does a coolant bypass system actually solve?
A: In the 6.7L Cummins, cylinders #5 and #6 at the rear of the block tend to run hotter due to uneven coolant circulation. A bypass circuit helps route coolant more evenly through the rear cylinder area, reducing thermal stress and promoting more consistent head temperatures during sustained heavy towing.
Q: Can I install this adapter alongside my EGR delete kit?
A: Yes. This barb adapter integrates with most 6.7L Cummins EGR delete and coolant reroute configurations, providing a secure connection point for coolant lines in the modified cooling circuit.
Q: What if I need a complete EGR and emissions solution for my 6.7L Ram?
A: This adapter is a great complement to a full system overhaul. For complete emissions hardware solutions, take a look at our DPF Delete Pipe and EGR Delete collections.
