PDI Big Boss Volvo D13 | Mack MP8 Exhaust Manifold Coating:Polished Ceramic Shift exhaust shields wrap tightly

Shift exhaust shields wrap tightly around the pipe

The Big Boss tuner combined with our high performing exhaust manifold delivers power while allowing better exhaust flow from the engine

Fire Ring Inserts

Crafted for the most demanding applications

Available for: Cummins X15 2017-2021 High Hp

PDI Big Boss Volvo D13 | Mack MP8 Exhaust Manifold Coating:Polished Ceramic Shift exhaust shields wrap tightlyAvailable for: Volvo D13 and Mack MP8 2016 2021 Key Benefits Up to 20% increase in airflow over stock 75 100 degree cooler EGTs Made in the USA Warranty: 3 Year Unlimited Mile Warranty PDI Big Boss Exhaust Manifolds are designed to maximize exhaust air flow to reduce turbo lag time and cool exhaust temperatures. In the design of the manifold each port is analyzed and tested to provide a balanced flow to the turbocharger. Big Boss Exhaust Manifolds