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the Big Boss Turbo is designed to help your engine produce more power while improving efficiency
Improved airflow and optimized exhaust pressure-to-boost pressure ratios can help support better fuel efficiency
PDI has increased airflow by up to 35% over the factory design
improve protection
eliminating the traditional o-ring design used on some engines
CUMMINS ISX15 | X15 CHROME EXHAUST MANIFOLD Snapback the Big Boss Turbo isIf youre looking to improve the performance and durability of your Cummins ISX15 or X15, the PDI Big Boss Exhaust Manifold is engineered to deliver better airflow, cooler exhaust temperatures, and improved turbo response. PDI designed this manifold to maximize exhaust airflow, helping reduce turbo lag and allowing the turbocharger to spool more efficiently. During development, each runner was carefully analyzed and tested to ensure balanced airflow