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4 chrome rear axle covers
you’ll keep the temperatures down and decrease the strain placed on the engine as you see more horsepower and fuel efficiency
Efficiency
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NOT LEGAL FOR SALE OR USE IN CALIFORNIA
PDI Big Boss Stage 1 Performance Kit for Cummins X15 and ISX X15 4 chrome rear axle coversKit Includes: Big Boss Performance Tuner with Mount Big Boss Performance Intake Manifold Available for: 2010 2021 Cummins ISX15 & X15 Engines Warranty: 1 Year Unlimited Mile Warranty PDI Big Boss Performance Packages are put together with performance, efficiency, and savings in mind. The Big Boss tuner combined with our high performing intake manifold delivers power while balancing intake air to the engine. As direct replacement products they are