{"product_id":"small-block-chev-327-350-400-212cc-aluminium-cylinder-heads-pair","title":"Small Block Chev 327-350-400 212cc Aluminium Cylinder Heads Pair","description":"\u003cdiv\u003e\n\u003ch2\u003eAeroflow 212cc Aluminium Small Block Chevy Cylinder Heads (Pair) for Street \u0026amp; Strip\u003c\/h2\u003e\n\u003cp\u003eElevate your small block Chevy’s performance with Aeroflow’s complete aluminium cylinder heads. Crafted from ultra-smooth A356-T6 castings, these heads push flow numbers higher thanks to new as-cast runner and chamber designs, a precision 5-angle valve job, diamond-honed bronze guides, hand bowl blending, and professional assembly. Designed for street and drag applications, they deliver impressive flow at a competitive price for 327-350-400 small block builds.\u003c\/p\u003e \u003ch3\u003eKey specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaterial: A356 Aluminium\u003c\/li\u003e \u003cli\u003eChamber: 66cc\u003c\/li\u003e \u003cli\u003eIntake Port Volume: 210cc | Intake Port Dimension: 2.21\" x 1.30\"\u003c\/li\u003e \u003cli\u003eExhaust Port Volume: 72cc | Exhaust Port Dimension: 1.42\" H x 1.53\" W\u003c\/li\u003e \u003cli\u003eExhaust Port Location: Raised.250\"\u003c\/li\u003e \u003cli\u003eSpark Plug Location: Angled\u003c\/li\u003e \u003cli\u003eIntake Valve Diameter: 2.08\"\u003c\/li\u003e \u003cli\u003eExhaust Valve Diameter: 1.60\"\u003c\/li\u003e \u003cli\u003eValve Stem Diameter: 8mm\u003c\/li\u003e \u003cli\u003eValve Spring Pocket I.D.: 1.57\"\u003c\/li\u003e \u003cli\u003eValve Guide Material: Bronze | Valve Guide O.D.:.502\" (0.560\" at base)\u003c\/li\u003e \u003cli\u003eRocker Stud Thread Size: 7\/16\" x 14\u003c\/li\u003e \u003cli\u003eValve Angle: 23°\u003c\/li\u003e \u003cli\u003eDeck Thickness:.750\"\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eValve train \u0026amp; spring details\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eValve Spring Specifications: Installed Height 1.990\" | Installed Pressure 190 lbs\u003c\/li\u003e \u003cli\u003eOpen Pressure: 430 lbs @ 500\" | Maximum Lift:.750\" @ 1.240\"\u003c\/li\u003e \u003cli\u003eCoil Bind: 1.190\" | Spring Outside Diameter: 1.570\" | Spring Inside Diameter: 0.790\"\u003c\/li\u003e \u003cli\u003eSpring Free Length: 2.480\"\u003c\/li\u003e \u003cli\u003eValve Spring Retainer Outside Diameter: 1.500\" | Inside Diameter: 0.465\"\u003c\/li\u003e \u003cli\u003eValve Spring Retainer Step 1: 1.120\" | Step 2: 0.705\"\u003c\/li\u003e \u003cli\u003eValve Spring Locator Outside Diameter: 1.6100\" | Inside Diameter: 0.565\"\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eDesign, performance \u0026amp; compatibility\u003c\/h3\u003e\n\u003cp\u003eThe Aeroflow series of aluminium cylinder heads are built to unlock affordable performance for street and strip engines. These 212cc (intake) heads are designed for idle to 7500 rpm operation, and are suitable for 4.00\" bore and larger engines. They arrive as a complete package and are designed to work with solid and hydraulic roller camshafts. The heads include larger-than-stock 1.57\" diameter dual valve springs capable of handling up to 0.625\" maximum lift, delivering robust lift without compromising reliability.\u003c\/p\u003e \u003ch3\u003eWhat’s included\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eComplete cylinder heads (pair)\u003c\/li\u003e \u003cli\u003eValves, valve springs, retainers \u0026amp; locks\u003c\/li\u003e \u003cli\u003eGuide plates\u003c\/li\u003e \u003cli\u003e7\/16\" rocker studs\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePerformance edge \u0026amp; installation notes\u003c\/h3\u003e\n\u003cp\u003eThese heads leverage advanced flow design and a refined chamber to support stronger mid-range torque and higher peak power in street and strip applications. Important installation note: check installed spring seat pressure and open pressure before installation to ensure the spring pressure matches your specific engine setup and cam profile.\u003c\/p\u003e \u003ch3\u003eIdeal applications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eSmall Block Chevy engines in the 327, 350, and 400 range\u003c\/li\u003e \u003cli\u003eStreet cruisers, street\/strip builds, and budget performance projects\u003c\/li\u003e \u003cli\u003eEngines sized for bore 4.00\" and larger\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"TGM Performance Parts","offers":[{"title":"Default Title","offer_id":47477641380010,"sku":"AF95-2400","price":2152.7,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/7829\/4698\/files\/AF95-2327_3.jpg?v=1759279212","url":"https:\/\/tgmperformance.com.au\/products\/small-block-chev-327-350-400-212cc-aluminium-cylinder-heads-pair","provider":"TGM Performance Parts","version":"1.0","type":"link"}