{"product_id":"psi-power-performance-tuner-98-03-cummins-5-9l-medium-duty-engine","title":"PSI Power Performance Tuner 98-03 Cummins ISB 5.9L Medium Duty Engine","description":"\u003cp\u003eGive your medium-duty 5.9L Cummins the added power and responsiveness it needs with the PSI Power Performance Module. Designed for 1998–2003 Cummins engines equipped with the Bosch VP44 injection pump, this module delivers up to 30% more horsepower and torque while offering the potential for improved fuel economy. Whether you're pulling a heavy trailer, climbing grades in a motorhome, or working your truck under load, the additional performance helps the engine respond more effectively when you need it. An adjustable three-position switch lets you select between stock, 15% increased power, and up to 30% increased power, giving you control over how much performance you want.\u003c\/p\u003e\n\u003cp\u003eThe PSI 12300 uses load-based electronic signal optimization rather than rewriting or flashing the factory ECM. Its plug-and-play wiring connections integrate with the factory engine harness without requiring cutting, splicing, or permanent wiring modifications. The included mechanical switch allows you to change power settings, while the module works with the factory engine management system to adjust engine performance.\u003c\/p\u003e","brand":"PSI Power","offers":[{"title":"Default Title","offer_id":67987087229293,"sku":"PSI-12300","price":795.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/2487\/2301\/files\/rjF5tODk__55251.jpg?v=1794583033","url":"https:\/\/dieselpowerproducts.com\/products\/psi-power-performance-tuner-98-03-cummins-5-9l-medium-duty-engine","provider":"Diesel Power Products","version":"1.0","type":"link"}