07-18 Cummins 6.7 Fleece Coolant Bypass Kit Years:13-18 Rear Planet

Rear Planet

It is machined from 9310 VACU-MELT material then Heat Treated for torsional strength and precision ground on all critical diameters

Combination Exhaust Brake & TapShifter

We recommend talking to who does your tuning first before purchasing

The 10th character is the year of the truck

07-18 Cummins 6.7 Fleece Coolant Bypass Kit Years:13-18 Rear PlanetIncreased Coolant Flow, Decreased Coolant Temperatures See Video at bottom for a youtube install video The rear cylinders on the 5. 9 6. 7L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatures. This can cause excessive pressure to build in the cooling system, especially the rear of the block and blow out freeze plugs externally, or the smaller diameter plugs under the valve cover, leading to a failure.