{"product_id":"pdi-big-boss-stage-2-performance-kit-cummins-x15-isx15","title":"PDI Big Boss Stage 2 Performance Kit – Cummins X15 \u0026 ISX15 | SKU 7157728","description":"\u003ch2\u003ePDI Big Boss Stage 2 Performance Kit – Cummins X15 \u0026amp; ISX15\u003c\/h2\u003e\n\n\u003cp\u003e\nThe PDI Big Boss Stage 2 Performance Kit is the next level in Cummins X15 and ISX15 performance upgrades. Building upon the proven airflow improvements of the Stage 1 package, the Stage 2 Kit combines PDI's industry-leading intake, exhaust, and cooling technologies into one complete performance system designed to maximize efficiency, reliability, and horsepower potential.\n\u003c\/p\u003e\n\n\u003cp\u003e\nEngineered specifically for owner-operators and fleets that demand more from their equipment, the Stage 2 package helps reduce turbo lag, improve throttle response, lower exhaust gas temperatures (EGTs), reduce oil temperatures, and improve overall engine efficiency under heavy loads.\n\u003c\/p\u003e\n\n\u003cp\u003e\nWhether you're pulling heavy freight through mountain grades, operating in extreme climates, or looking to maximize engine longevity, the PDI Big Boss Stage 2 Performance Kit delivers one of the most comprehensive bolt-on upgrades available for Cummins ISX15 and X15 engines.\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 Intake Manifold\u003c\/li\u003e\n\n\u003cli\u003ePDI Big Boss Exhaust Manifold\u003c\/li\u003e\n\n\u003cli\u003ePDI Big Boss Dual Oil Cooler System\u003c\/li\u003e\n\n\u003cli\u003eRequired hardware and installation components\u003c\/li\u003e\n\n\u003cli\u003ePDI engineered performance package designed to improve airflow and cooling efficiency\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 airflow and cooling performance package\u003c\/li\u003e\n\n\u003cli\u003eDesigned for Cummins ISX15 and X15 engines\u003c\/li\u003e\n\n\u003cli\u003eImproves intake airflow throughout the engine\u003c\/li\u003e\n\n\u003cli\u003eImproves exhaust flow to the turbocharger\u003c\/li\u003e\n\n\u003cli\u003eReduces turbo lag and improves spool-up\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\u003c\/li\u003e\n\n\u003cli\u003eBuilt for severe-duty commercial applications\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™ Stage 2\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 7157728\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\u003eProduct Type:\u003c\/strong\u003e Performance Upgrade Package\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Direct Bolt-On Components\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 performance-focused applications.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003ePerformance Benefits\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eImproved intake airflow efficiency\u003c\/li\u003e\n\n\u003cli\u003eImproved exhaust flow and turbocharger performance\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\u003eLower engine oil temperatures\u003c\/li\u003e\n\n\u003cli\u003eEnhanced engine reliability\u003c\/li\u003e\n\n\u003cli\u003eImproved throttle response\u003c\/li\u003e\n\n\u003cli\u003ePotential fuel economy improvements\u003c\/li\u003e\n\n\u003cli\u003eBetter pulling power under load\u003c\/li\u003e\n\n\u003cli\u003eReduced thermal stress on critical engine components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eWhy Upgrade to the Stage 2 Kit?\u003c\/h3\u003e\n\n\u003cp\u003e\nThe Stage 2 Performance Kit addresses two of the biggest challenges facing modern heavy-duty diesel engines: airflow restriction and heat management. By combining upgraded intake and exhaust components with PDI's Dual Oil Cooler system, the Stage 2 package creates a more efficient engine environment that supports both performance and long-term reliability.\n\u003c\/p\u003e\n\n\u003cp\u003e\nLower operating temperatures and improved airflow help protect expensive engine components including turbochargers, pistons, bearings, cylinder heads, and valve train assemblies.\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 Reliability \u0026amp; Performance Package\u003c\/h3\u003e\n\n\u003cp\u003e\nIf you're looking for more than just horsepower, the PDI Big Boss Stage 2 Kit delivers a complete performance and cooling solution designed for real-world trucking applications.\n\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e✔ Increased airflow throughout the engine\u003c\/li\u003e\n\u003cli\u003e✔ Improved turbo efficiency\u003c\/li\u003e\n\u003cli\u003e✔ Reduced turbo lag\u003c\/li\u003e\n\u003cli\u003e✔ Lower EGTs\u003c\/li\u003e\n\u003cli\u003e✔ Lower oil temperatures\u003c\/li\u003e\n\u003cli\u003e✔ Improved engine durability\u003c\/li\u003e\n\u003cli\u003e✔ Made in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\nTrusted by owner-operators, performance enthusiasts, and fleets that demand maximum reliability and efficiency from their Cummins engines.\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 has spent decades engineering airflow and cooling solutions for the heavy-duty trucking industry. Their Big Boss product line is designed specifically to help diesel engines run cooler, breathe better, and perform more efficiently under demanding operating conditions.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eRecommended Upgrades\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003ePDI Big Boss Turbocharger Upgrades\u003c\/li\u003e\n\n\u003cli\u003eHigh-Flow Air Intake Systems\u003c\/li\u003e\n\n\u003cli\u003ePremium Fuel Filtration Systems\u003c\/li\u003e\n\n\u003cli\u003ePerformance Charge Air Coolers\u003c\/li\u003e\n\n\u003cli\u003eHeavy-Duty Cooling Components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eFitment Notice\u003c\/h3\u003e\n\n\u003cp\u003e\nVerify engine model and engine serial number (ESN) before ordering. Contact our team for application verification and product recommendations.\n\u003c\/p\u003e\n\u003cdiv style=\"background:#fff7ef;padding:20px;border:1px solid #ffb366;border-radius:8px;margin-top:20px;\"\u003e\n\u003ch3\u003e🚛 Complete Your X15 Performance Build\u003c\/h3\u003e\n\n\u003cp\u003eCustomers purchasing the Stage 2 Kit frequently add:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e✔ PDI Big Boss Turbocharger\u003c\/li\u003e\n\u003cli\u003e✔ PDI Big Boss CAC Pipe Kit\u003c\/li\u003e\n\u003cli\u003e✔ High-Performance Air Filters\u003c\/li\u003e\n\u003cli\u003e✔ Premium Fuel Filter Service Kits\u003c\/li\u003e\n\u003cli\u003e✔ Water Pump \u0026amp; Cooling System Components\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eBundle maintenance and performance upgrades together to maximize reliability and reduce downtime.\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"PDI | Performance Diesel Inc.","offers":[{"title":"Default Title","offer_id":66832494231597,"sku":"7157728","price":6935.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0736\/4526\/0845\/files\/BigBossStage2PerformanceKit_updatedforWeb.jpg?v=1780758806","url":"https:\/\/performancedieselgroup.com\/products\/pdi-big-boss-stage-2-performance-kit-cummins-x15-isx15","provider":"Performance Diesel Group","version":"1.0","type":"link"}