{"product_id":"performance-cylinder-head-stage-1-dodge-ram-5-9l-cummins-2003-2007","title":"Performance Cylinder Head (Stage 1) Dodge\/Ram 5.9L Cummins 2003-2007","description":"The 2003-2007 5.9 Stage 1 Cummins Performance Cylinder Head is designed to deliver increased airflow and durability without the added cost and complexity of an aftermarket intake. Featuring 105-pound valve springs and a 5-axis CNC port job, this head significantly boosts intake flow from 155 CFM to 220 CFM, improving low-end performance, reducing boost pressure, and lowering EGTs. Built on the foundation of the HP Reman Head, it includes new bronze guides, oversized hardened seats, and a high-performance CNC valve job for enhanced longevity and efficiency. Manufactured by D\u0026amp;J Precision Machine, this cylinder head is a proven upgrade for both stock and performance-driven Cummins builds.","brand":"DJPCH100026","offers":[{"title":"w\/o Fire Rings","offer_id":46447507079339,"sku":"DJPCH100026","price":3149.99,"currency_code":"USD","in_stock":true},{"title":"with Fire Rings","offer_id":46447507112107,"sku":"DJPCH100202","price":3964.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0173\/1598\/7520\/files\/performance-cylinder-head-stage-1-dodge-ram-5-9l-cummins-2003-2007.jpg?v=1776103613","url":"https:\/\/bd-sandbox-usd.myshopify.com\/products\/performance-cylinder-head-stage-1-dodge-ram-5-9l-cummins-2003-2007","provider":"BD Diesel Sandbox USA","version":"1.0","type":"link"}