{"product_id":"pdi-big-boss-compound-turbo-kit-cummins-x15-isx15","title":"PDI Big Boss Compound Turbo Kit – Cummins X15 \u0026 ISX15 | SKU 141715895041","description":"\u003ch2\u003ePDI Big Boss Compound Turbo Kit – Cummins X15 \u0026amp; ISX15\u003c\/h2\u003e\n\n\u003cp\u003e\nThe PDI Big Boss Compound Turbo Kit is the ultimate turbocharger upgrade for Cummins ISX15 and X15 engines. Engineered for serious owner-operators, performance enthusiasts, and heavy-haul applications, this twin turbo system is designed to dramatically improve airflow, increase horsepower potential, reduce exhaust gas temperatures, and enhance overall engine efficiency. The system is built to support applications producing 550–700 horsepower while maintaining excellent drivability and reliability.\n\u003c\/p\u003e\n\n\u003cp\u003e\nUnlike a conventional single turbo setup, the PDI Big Boss Compound System utilizes both a high-pressure and low-pressure turbocharger working together to deliver increased airflow throughout the entire RPM range. This results in faster spool-up, improved boost response, lower EGTs, and stronger pulling power under heavy loads.\n\u003c\/p\u003e\n\n\u003cp\u003e\nWhether you're climbing mountain grades, hauling oversized loads, or simply looking for maximum performance from your Cummins engine, the PDI Big Boss Compound Kit provides one of the most effective airflow upgrades available for the ISX15 and X15 platform. :contentReference[oaicite:0]{index=0}\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eComplete compound twin turbocharger system\u003c\/li\u003e\n\n\u003cli\u003eDesigned for Cummins ISX15 and X15 engines\u003c\/li\u003e\n\n\u003cli\u003eSupports 550–700 horsepower applications\u003c\/li\u003e\n\n\u003cli\u003eImproves airflow throughout the RPM range\u003c\/li\u003e\n\n\u003cli\u003eReduces turbo lag\u003c\/li\u003e\n\n\u003cli\u003eImproves throttle response\u003c\/li\u003e\n\n\u003cli\u003eLowers exhaust gas temperatures (EGTs)\u003c\/li\u003e\n\n\u003cli\u003eIncreases boost efficiency\u003c\/li\u003e\n\n\u003cli\u003eBuilt for heavy-duty commercial trucking applications\u003c\/li\u003e\n\n\u003cli\u003eDesigned to maximize engine performance and reliability\u003c\/li\u003e\n\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e PDI Performance Diesel\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e Big Boss™ Compound System\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 141715895041\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Cummins ISX15 \u0026amp; X15\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eEngine Years:\u003c\/strong\u003e 2010–2020\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eHorsepower Capability:\u003c\/strong\u003e 550–700 HP\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eTurbo Configuration:\u003c\/strong\u003e Compound Twin Turbo System\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Unlimited Mileage Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\n\u003cp\u003e\nCompatible with Cummins ISX15 and X15 powered Peterbilt, Kenworth, Freightliner, Western Star, International, and Volvo trucks operating in long-haul, heavy-haul, vocational, agricultural, and performance applications. :contentReference[oaicite:1]{index=1}\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003ePerformance Benefits\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eSupports 550–700 horsepower builds\u003c\/li\u003e\n\n\u003cli\u003eSignificantly improved airflow capacity\u003c\/li\u003e\n\n\u003cli\u003eFaster turbo spool-up\u003c\/li\u003e\n\n\u003cli\u003eReduced turbo lag\u003c\/li\u003e\n\n\u003cli\u003eLower exhaust gas temperatures\u003c\/li\u003e\n\n\u003cli\u003eImproved fuel efficiency potential\u003c\/li\u003e\n\n\u003cli\u003eEnhanced pulling power under load\u003c\/li\u003e\n\n\u003cli\u003eImproved engine responsiveness\u003c\/li\u003e\n\n\u003cli\u003eBetter overall turbocharger efficiency\u003c\/li\u003e\n\n\u003cli\u003eReduced thermal stress on engine components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eWhy Upgrade to Compound Turbos?\u003c\/h3\u003e\n\n\u003cp\u003e\nA compound turbo system allows two turbochargers to work together, delivering higher airflow volumes while maintaining strong low-end response. The smaller turbo provides quick spool-up and immediate throttle response, while the larger turbo delivers the airflow needed to support higher horsepower levels and sustained performance under heavy loads.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThis design helps improve boost control, reduce exhaust temperatures, and create a broader powerband than a traditional single turbocharger setup.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eBuilt for Serious Cummins Performance\u003c\/h3\u003e\n\n\u003cp\u003e\nThe PDI Big Boss Compound Kit is designed for operators who demand maximum performance from their ISX15 or X15 engine. When paired with other Big Boss airflow products such as the Intake Manifold, Exhaust Manifold, and Performance Tuner, the system helps unlock the full performance potential of the Cummins platform. :contentReference[oaicite:2]{index=2}\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003cdiv style=\"background:#f8f8f8;padding:25px;border-left:4px solid #ff6a00;margin:25px 0;\"\u003e\n\u003ch3\u003e🔥 Maximize Airflow. Maximize Power.\u003c\/h3\u003e\n\n\u003cp\u003e\nThe PDI Big Boss Compound Turbo Kit is designed to move substantially more air than a factory turbocharger system, allowing your engine to produce more power while operating more efficiently.\n\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e✔ Supports 550–700 HP Applications\u003c\/li\u003e\n\u003cli\u003e✔ Reduced Turbo Lag\u003c\/li\u003e\n\u003cli\u003e✔ Faster Boost Response\u003c\/li\u003e\n\u003cli\u003e✔ Lower EGTs\u003c\/li\u003e\n\u003cli\u003e✔ Improved Pulling Power\u003c\/li\u003e\n\u003cli\u003e✔ Built for Heavy-Duty Trucking\u003c\/li\u003e\n\u003cli\u003e✔ Made in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\nIdeal for owner-operators, heavy-haul operators, and performance-minded fleets looking for the ultimate Cummins airflow upgrade.\n\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eWhy Choose PDI?\u003c\/h3\u003e\n\n\u003cp\u003e\nPDI Performance Diesel is one of the most respected names in heavy-duty diesel performance. Their Big Boss product line is engineered specifically for commercial trucking applications, delivering measurable improvements in airflow, cooling efficiency, durability, and real-world performance. :contentReference[oaicite:3]{index=3}\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eFitment Notice\u003c\/h3\u003e\n\n\u003cp\u003e\nVerify engine serial number (ESN) before ordering. This kit is designed for 2010–2020 Cummins ISX15 and X15 engines. Contact us for fitment verification and installation recommendations.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003cdiv style=\"background:#fff7ef;padding:20px;border:1px solid #ffb366;border-radius:8px;margin-top:20px;\"\u003e\n\u003ch3\u003e🚛 Frequently Purchased Together\u003c\/h3\u003e\n\n\u003cp\u003eCustomers purchasing the PDI Compound Kit frequently add:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e✔ PDI Big Boss Performance Tuner\u003c\/li\u003e\n\u003cli\u003e✔ PDI Big Boss Intake Manifold\u003c\/li\u003e\n\u003cli\u003e✔ PDI Big Boss Exhaust Manifold\u003c\/li\u003e\n\u003cli\u003e✔ PDI Big Boss Dual Oil Cooler\u003c\/li\u003e\n\u003cli\u003e✔ High-Flow Charge Air Cooler (CAC) Piping\u003c\/li\u003e\n\u003cli\u003e✔ Premium Fuel Filtration Systems\u003c\/li\u003e\n\u003cli\u003e✔ Heavy-Duty Cooling Components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\n\u003cstrong\u003eCombine airflow, cooling, and tuning upgrades to maximize horsepower, reliability, fuel efficiency, and turbocharger performance.\u003c\/strong\u003e\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"PDI | Performance Diesel Inc.","offers":[{"title":"Default Title","offer_id":66832855498797,"sku":"141715895041","price":6850.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/4526\/0845\/files\/141715895041.png?v=1780770694","url":"https:\/\/performancedieselgroup.com\/products\/pdi-big-boss-compound-turbo-kit-cummins-x15-isx15","provider":"Performance Diesel Group","version":"1.0","type":"link"}