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Rear Ring Gear Hub - BD Machined
Rear cover design deflects the oil back onto the ring gear and into the pinion gear for cooler longer life
the Unfinished trim is recommended
Dyno tested and track proven for ultimate performance
Fleece Cummins Coolant Bypass Kit (2006-2007 Auto Trans) Valvetrain 2010-2012 Cummins 6.7L Rear Ring Gear Hub -Increased Coolant Flow, Decreased Coolant Temperatures 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. Our coolant bypass kit adds a secondary
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