{"product_id":"pdi-big-boss-stage-3-performance-kit-cummins-x15-isx15","title":"PDI Big Boss Stage 3 Performance Kit – Cummins X15 \u0026 ISX15 | SKU 715773","description":"\u003ch2\u003ePDI Big Boss Stage 3 Performance Kit – Cummins X15 \u0026amp; ISX15\u003c\/h2\u003e\n\n\u003cp\u003e\nThe PDI Big Boss Stage 3 Performance Kit is the flagship performance package for Cummins ISX15 and X15 engines. Designed to deliver maximum airflow, superior cooling, improved drivability, and enhanced engine efficiency, this complete system combines PDI's most advanced Big Boss components into one comprehensive upgrade package. The kit includes a Performance Tuner, Intake Manifold, Ceramic-Coated Exhaust Manifold, and Dual Oil Cooler to create the ultimate performance and reliability solution. :contentReference[oaicite:0]{index=0}\n\u003c\/p\u003e\n\n\u003cp\u003e\nBy improving both intake and exhaust flow while reducing oil temperatures, the Stage 3 Kit helps your engine breathe easier, operate cooler, and respond faster under load. Whether you're hauling heavy freight through mountain grades, operating in extreme temperatures, or simply looking to maximize engine efficiency, this package is designed to deliver measurable real-world results. :contentReference[oaicite:1]{index=1}\n\u003c\/p\u003e\n\n\u003cp\u003e\nFor owner-operators and fleets looking for the most complete Cummins performance upgrade available, the PDI Big Boss Stage 3 Package represents the pinnacle of airflow, cooling, and performance engineering. :contentReference[oaicite:2]{index=2}\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003ePDI Big Boss Performance Tuner with Mount\u003c\/li\u003e\n\n\u003cli\u003ePDI Big Boss Intake Manifold\u003c\/li\u003e\n\n\u003cli\u003ePDI Big Boss Ceramic-Coated Exhaust Manifold\u003c\/li\u003e\n\n\u003cli\u003ePDI Big Boss Dual Oil Cooler\u003c\/li\u003e\n\n\u003cli\u003eExhaust Manifold Installation Kit\u003c\/li\u003e\n\n\u003cli\u003eStainless Spacer and Bolt Kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eComplete performance, airflow, and cooling package\u003c\/li\u003e\n\n\u003cli\u003eDesigned for Cummins ISX15 and X15 engines\u003c\/li\u003e\n\n\u003cli\u003eIncludes PDI Big Boss Performance Tuner\u003c\/li\u003e\n\n\u003cli\u003eImproves intake airflow efficiency\u003c\/li\u003e\n\n\u003cli\u003eImproves exhaust flow to the turbocharger\u003c\/li\u003e\n\n\u003cli\u003eHelps reduce turbo lag\u003c\/li\u003e\n\n\u003cli\u003eLowers exhaust gas temperatures (EGTs)\u003c\/li\u003e\n\n\u003cli\u003eReduces engine oil temperatures\u003c\/li\u003e\n\n\u003cli\u003eImproves throttle response and drivability\u003c\/li\u003e\n\n\u003cli\u003eSupports improved fuel economy and pulling power\u003c\/li\u003e\n\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\n\u003cli\u003e1-Year Unlimited Mileage Warranty\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™ Stage 3\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 715773\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Cummins X15 \u0026amp; ISX15\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eEngine Years:\u003c\/strong\u003e 2010–2024\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1 Year Unlimited Mileage Warranty\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eMade In:\u003c\/strong\u003e USA\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 X15 and ISX15 powered Peterbilt, Kenworth, Freightliner, Western Star, International, and Volvo trucks operating in long-haul, heavy-haul, vocational, and owner-operator applications. :contentReference[oaicite:3]{index=3}\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003ePerformance Benefits\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eMaximum airflow improvement throughout the engine\u003c\/li\u003e\n\n\u003cli\u003eImproved turbocharger efficiency\u003c\/li\u003e\n\n\u003cli\u003eReduced turbo lag\u003c\/li\u003e\n\n\u003cli\u003eLower EGTs under heavy loads\u003c\/li\u003e\n\n\u003cli\u003eReduced oil temperatures\u003c\/li\u003e\n\n\u003cli\u003eEnhanced throttle response\u003c\/li\u003e\n\n\u003cli\u003eImproved drivability and pulling power\u003c\/li\u003e\n\n\u003cli\u003ePotential fuel economy improvements\u003c\/li\u003e\n\n\u003cli\u003eReduced thermal stress on engine components\u003c\/li\u003e\n\n\u003cli\u003eEnhanced long-term engine reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eWhy Choose the Stage 3 Kit?\u003c\/h3\u003e\n\n\u003cp\u003e\nUnlike individual performance upgrades, the Stage 3 Kit addresses every major airflow and cooling restriction within the engine system. The intake manifold improves incoming airflow, the exhaust manifold improves exhaust evacuation, the Dual Oil Cooler reduces oil temperatures, and the Big Boss Tuner optimizes engine performance. Together, these components create a balanced system engineered for maximum efficiency and reliability. :contentReference[oaicite:4]{index=4}\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🔥 The Ultimate Cummins X15 Upgrade Package\u003c\/h3\u003e\n\n\u003cp\u003e\nThe PDI Big Boss Stage 3 Kit combines every major airflow and cooling upgrade into one complete package, helping your engine run cooler, pull harder, and operate more efficiently.\n\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e✔ Big Boss Performance Tuner Included\u003c\/li\u003e\n\u003cli\u003e✔ Big Boss Intake Manifold Included\u003c\/li\u003e\n\u003cli\u003e✔ Big Boss Exhaust Manifold Included\u003c\/li\u003e\n\u003cli\u003e✔ Big Boss Dual Oil Cooler Included\u003c\/li\u003e\n\u003cli\u003e✔ Reduced Turbo Lag\u003c\/li\u003e\n\u003cli\u003e✔ Lower EGTs \u0026amp; Oil Temperatures\u003c\/li\u003e\n\u003cli\u003e✔ Improved Engine Efficiency\u003c\/li\u003e\n\u003cli\u003e✔ Made in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\nBuilt for serious owner-operators and fleets looking for maximum performance, reliability, and efficiency from their Cummins X15 platform.\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 trusted names in heavy-duty diesel performance. Their Big Boss product line is engineered specifically for commercial trucking applications and focuses on improving airflow, cooling efficiency, durability, and real-world performance. :contentReference[oaicite:5]{index=5}\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. Contact us with your ESN for fitment verification and product 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 Stage 3 Kit commonly add:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e✔ PDI Big Boss Turbocharger Upgrades\u003c\/li\u003e\n\u003cli\u003e✔ High-Flow Air Filter Systems\u003c\/li\u003e\n\u003cli\u003e✔ Charge Air Cooler (CAC) Pipe Kits\u003c\/li\u003e\n\u003cli\u003e✔ Premium Fuel Filtration Kits\u003c\/li\u003e\n\u003cli\u003e✔ Water Pumps \u0026amp; Cooling Components\u003c\/li\u003e\n\u003cli\u003e✔ Engine Sensor Replacement Kits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\n\u003cstrong\u003eBundle performance and maintenance upgrades together to maximize reliability, fuel efficiency, and uptime.\u003c\/strong\u003e\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"PDI | Performance Diesel Inc.","offers":[{"title":"Default Title","offer_id":66832851075117,"sku":"715773","price":11035.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/4526\/0845\/files\/CumminsPackage.png?v=1780770533","url":"https:\/\/performancedieselgroup.com\/products\/pdi-big-boss-stage-3-performance-kit-cummins-x15-isx15","provider":"Performance Diesel Group","version":"1.0","type":"link"}