{"product_id":"s58-cnc-cylinder-head-stud-conversion","title":"S58 CNC Cylinder Head Stud Conversion","description":"\u003ch2 data-section-id=\"192bxpr\" data-start=\"0\" data-end=\"36\"\u003eCNC Cylinder Head Stud Conversion\u003c\/h2\u003e\n\u003cp data-start=\"38\" data-end=\"161\"\u003eIf you’re building a S58 engine that’s going to see 1200HP+, the way your head studs are set up is critical.\u003c\/p\u003e\n\u003cp data-start=\"163\" data-end=\"460\"\u003eWe CNC machine cylinder heads to properly convert them for larger head studs, making sure everything is aligned, consistent, and accurately positioned. This isn’t a quick drill job or a “close enough” fitment. It’s done on a CNC machine so the geometry is exactly where it needs to be every time.\u003c\/p\u003e\n\u003cp data-start=\"462\" data-end=\"707\"\u003eSome shops will simply drill the holes by hand, and while that may work for mild setups, it introduces unnecessary risk. Even small misalignment, inconsistent depth, cracks, or uneven threading can turn into issues once the engine is under pressure.\u003c\/p\u003e\n\u003cp data-start=\"709\" data-end=\"866\"\u003eWith CNC machining, each hole is centered correctly, cut to the proper depth, and finished clean so the washer inset and nuts seat properly and clamp evenly across the entire cylinder head.\u003c\/p\u003e\n\u003cp data-start=\"1077\" data-end=\"1202\"\u003e\u003cstrong data-start=\"1077\" data-end=\"1096\"\u003eImportant note:\u003c\/strong\u003e oversized head studs and block conversion hardware must be used together for proper fitment and function.\u003c\/p\u003e\n\u003cp data-start=\"1204\" data-end=\"1322\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eIt’s a small detail in the machining process, but it makes a big difference in how the engine holds up when it counts.\u003c\/p\u003e","brand":"5150 AutoSport","offers":[{"title":"Default Title","offer_id":53324881985843,"sku":"5150-11-CNCCY-S58","price":500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/3827\/3587\/files\/BMW-S58-Cylinder-Head-with-Performance-Valve-Seats-Installed.webp?v=1732555731","url":"https:\/\/5150autosport.com\/sv\/products\/s58-cnc-cylinder-head-stud-conversion","provider":"5150 AutoSport","version":"1.0","type":"link"}