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OEM Reference Part Number 1863537
OEM Cross Reference 1337052
Compacted Graphite Iron (CGI) Casting
OEM Cross Reference 2894920
Premium Black Powder CoatCorrosion-resistant finish protects against road salts
PDI Big Boss Intake Manifold for Cummins ISX 03-07 4327147RX OEM Reference Part Number 1863537Available for: 2003 2007 Cummins ISX15 Engine Warranty: 1 Year Limited Mile Warranty Factory intakes are designed in such a way that restricts the clean air flow to the engine and allow for more exhaust air (EGR) to reach the intake. The Big Boss Intake is made to allow up to 15 percent more clean air into the engine while still mounting in the factory position with the factory hardware. We do this by eliminating the necked down design that the
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