MBRP 4" DPF Back Exhaust Tour Profile Single Side Exit Exhaust 15-16 GM 6.6L Duramax LML PSP-PP-66-220SK This causes main cap walk

This causes main cap walk and improper alignment of the piston and crankshaft bores

The Predator tuner is an awesome upgrade for your Cummins

5" or 4") which will improve airflow

For those guys that have lifted Dodge trucks that want a quality track bar

1 pulses per revolution up to 255 pulses per revolution

MBRP 4" DPF Back Exhaust Tour Profile Single Side Exit Exhaust 15-16 GM 6.6L Duramax LML PSP-PP-66-220SK This causes main cap walkFactory exhausts restrict flow on the 6. 6L Duramax, creating backpressure that chokes turbo efficiency and reduces low end torque. Exhaust pulses collide in tight bends, heat spikes in the manifolds, and the turbo spool lags under load. You feel it immediately when towing or accelerating. The throttle response is dull, and exhaust resonance is uneven, signaling inefficiencies in the stock design. Installing the Armor Lite changes the airflow dynamics