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Fits over OEM surge tank cap
Available for: 1989-2008 Cat 3406
The Big Boss tuner combined with our high performing exhaust manifold delivers power while allowing better exhaust flow from the engine
Whether you’re looking to replace a worn-out component or service your engine’s cooling system
PDI Big Boss Cummins X15 SOHC Stage 2 Cylinder Head Extend Fits over OEM surge tankAvailable for: 2010 2025 Cummins ISX and X15 Engines Key Benefits High Nickel Casting Inconel Exhaust and Intake Valves Stainless Steel Fire Ring Enhanced Airflow and Combustion Chambers Improved Cooling Passages Made in the USA Warranty: 2 Year Unlimited Mileage PDI Big Boss Cummins ISX X15 Stage 2 Cylinder heads are meticulously designed to surpass the most demanding expectations, making them the perfect choice for heavy duty applications in
US$ 597.50
US$ 475.00
US$ 170.00
