{"product_id":"stage-2-5-cnc-porting-service","title":"Stage 2.5 CNC Porting Service","description":"The Precision Race Components (PRC) Stage 2.5 CNC Porting Service transforms your customer-supplied cathedral port cylinder heads into high-performance components. This comprehensive service focuses on maximizing airflow and performance for 4.8L and 5.3L LS-based engines.\n\nThe multi-stage CNC machining process encompasses disassembly, deep cleaning, precise CNC porting and valve jobs, CNC engraving of PRC logos, milling to your specific requirements, reassembly, and thorough pressure testing to ensure optimal performance and reliability.\n\nFlow data for the Stage 2.5 5.3L configuration shows significant airflow improvements, with figures reaching 147 cfm at 0.200\" lift on the intake side and 111 cfm on the exhaust side. At 0.600\" lift, intake flow reaches 308 cfm, and exhaust flow is 223 cfm. Valve spring upgrades are available as an optional add-on during the configuration process, with options ranging from .550\" lift to .750\" lift kits. If you are purchasing valve springs separately, PRC can install them for you upon request.\n\nIt is crucial to remove all cylinder head accessories, including spark plugs, coolant plugs, and steam port blocks, before shipping your heads to Texas Speed and Performance. The company is not responsible for any lost parts during transit. This service is not legal for sale or use in the state of California.","brand":"Precision","offers":[{"title":"Default Title","offer_id":52663326146872,"sku":"199-5.32.5","price":1399.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687528072.png?v=1784325969","url":"https:\/\/store.motormia.co\/products\/stage-2-5-cnc-porting-service","provider":"MOTORMIA","version":"1.0","type":"link"}