{"product_id":"ls7-performance-reworked-cylinder-head-set","title":"LS7 Performance Reworked Cylinder Head Set","description":"The American Heritage Performance Package 4 LS7 Cylinder Heads are a performance upgrade designed for LS7 engines. This package includes a performance valve job, which is stated to add 5hp+ over a stock valve job. The heads are cleaned and bead blasted, then resurfaced or milled. They feature hardened aftermarket powder metal valve guides and stock titanium intake valves that have been treated and polished.\n\nThe cylinder heads are assembled with new Viton valve seals and tested\/approved for reuse of stock LS7 valve springs. Customers can also opt for upgraded valve springs, such as PAC 1207x, PSI 1516 ML, or BTR Duals, along with titanium retainers. For valve guides, Moldstar90, a premium material used in Formula 1 and IndyCar, is available as an upgrade, offering superior thermal properties and self-hardening characteristics.\n\nIntake valve options include the stock GM LS7 ti intake valve (noted for potential CRN coating failure), the AHP Ti Moly intake valve (a hardened material that does not require coating and offers maximum longevity), and the Ferrea Hollow Intake Valve (a heavier, hard steel valve requiring beefier springs). Exhaust valve options include GM Sodium LS7 (late design) and Ferrea F2042p Hollow SS. The product listing also details options for CHE Trunion upgrades and core exchange.\n\nThese cylinder heads are specifically listed for the Chevrolet Corvette C6 Z06 from 2006-2013. The product also mentions the availability of core sets of LS7 heads for those who wish to avoid downtime, with a $2,000 refundable core deposit. Core return cylinder heads must be fully assembled, in good workable condition, and be stock GM non-reworked heads.","brand":"American Heritage Performance","offers":[{"title":"Default Title","offer_id":52686901969208,"sku":"AHP-LS7-P4","price":1798.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/660674570.webp?v=1784878204","url":"https:\/\/store.motormia.co\/products\/ls7-performance-reworked-cylinder-head-set","provider":"MOTORMIA","version":"1.0","type":"link"}