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Ships within 48 hours · Estimated delivery Sep 14 - Sep 19
Available for: 2013-2021
PDI Big Boss Exhaust Manifolds are designed to maximize exhaust air flow to reduce turbo lag time and cool exhaust temperatures
and real-world engine demands in mind
Built to withstand the toughest heat cycle conditions
OEM Reference Part Number 23525990
PDI Big Boss Cummins X15 SOHC Stage 1 Cylinder Head 115-2989 Available for: 2013-2021Available for: 2010 2025 Cummins ISX and X15 Engines Key Benefits High Nickel Casting Inconel Exhaust and Intake Valves Stainless Retaining Clips Made in the USA Warranty: 2 Year Unlimited Mileage PDI Big Boss Cummins ISX X15 Stage 1 Cylinder heads are meticulously designed to surpass the most demanding expectations, making them the perfect choice for heavy duty applications in trucking, construction, agriculture, and more. They exemplify our