07-18 Cummins 6.7 Fleece Coolant Bypass Kit Years:13-18 It is machined from 9310

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

We recommend talking to who does your tuning first before purchasing

Combination Exhaust Brake & TapShifter

Includes light sensitivity meter to dim screen as ambient light decreases

07-18 Cummins 6.7 Fleece Coolant Bypass Kit Years:13-18 It is machined from 9310Increased 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.