Big Boss Performance Radiator | Peterbilt 379 X12 Big Boss CAT E-Model Exhaust

Big Boss CAT E-Model Exhaust Manifold

We advise conditioning the surfaces of your off-road vehicle

our Big Boss Connecting Rods are designed to withstand the toughest conditions

make sure that the surface to be polished has been thoroughly cleaned and dried

Thermal Stability

Big Boss Performance Radiator | Peterbilt 379 X12 Big Boss CAT E-Model ExhaustBig Boss performance radiators for Peterbilt 379 models feature a dimpled tube design to allow coolant more time to cool properly for more demanding applications. When combined with higher fin count and more efficient cores, PDI radiators increase cooling capacity 15 20% over OEM. Size and Fitment is direct replacement for simple installation. Call for availability.