{"product_id":"complete-small-block-ford-windsor-289-302-351-200cc-cnc-ported-alloy-cy-heads","title":"Complete Small Block Ford Windsor 289 302 351 200cc CNC Ported Alloy Cy Heads","description":"\u003cdiv\u003e\n\u003ch2\u003eAeroflow 200cc CNC Ported Aluminium Cylinder Heads for Small Block Ford Windsor (289-351) – Pair\u003c\/h2\u003e\n\u003cp\u003eUpgrade your Windsor-based street or strip engine with a complete pair of CNC ported aluminium cylinder heads. Built from A356-T6 aluminium and featuring precision port work, these heads are designed to deliver improved flow while keeping a practical price point for performance builds.\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePair of 200cc intake runners with a 60cc combustion chamber and 68cc exhaust port volume\u003c\/li\u003e \u003cli\u003eIntake port dimensions: 2.13\" x 1.28\"; Exhaust port dimensions: 1.40\" x 1.40\"\u003c\/li\u003e \u003cli\u003eMaterial: A356 Aluminium; Spark plug location: OEM\u003c\/li\u003e \u003cli\u003eValve sizes: Intake 2.08\" diameter; Exhaust 1.60\" diameter\u003c\/li\u003e \u003cli\u003eValve stem diameter: 8mm; Rocker stud thread: 7\/16\" x 14; Valve angle: 20°\u003c\/li\u003e \u003cli\u003eDeck thickness: 0.750\"\u003c\/li\u003e \u003cli\u003eValve springs (installed height 2.050\"): Installed pressure 175 lbs; Open pressure 415 lbs @ 500\"; Maximum lift 0.800\" @ 1.250\"; Coil bind 1.200\"\u003c\/li\u003e \u003cli\u003eSpring features: Outside diameter 1.570\", Inside diameter 0.790\", Free length 2.480\"\u003c\/li\u003e \u003cli\u003eValve spring retainers: Outside diameter 1.500\", Inside diameter 0.465\"; Retainer steps: 1.120\" and 0.705\"\u003c\/li\u003e \u003cli\u003eValve spring locator: Outside diameter 1.615\", Inside diameter 0.560\"\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePerformance and design highlights\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eFull CNC intake ports and chambered square exhaust ports, designed to maximize flow on street and race engines\u003c\/li\u003e \u003cli\u003e5-angle competition valve job, diamond-honed bronze guides, hand bowl blending, and professional assembly support for improved reliability\u003c\/li\u003e \u003cli\u003eDesigned to suit hydraulic roller camshafts and deliver strong mid-range to peak performance\u003c\/li\u003e \u003cli\u003eMaximum lift support up to 0.710\" with the specified 200cc port configuration\u003c\/li\u003e \u003cli\u003eDrilled for 1\/2\" head bolts; if using 7\/16\" head bolts, a head bolt bushing kit or step-down bolts are required\u003c\/li\u003e \u003cli\u003eImportant: verify installed spring seat pressure and open pressure before installation to ensure compatibility with your cam and valve train setup\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy these heads stand out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eAffordable Aeroflow performance: high-quality aluminium construction, deliberate CNC porting, and a focus on practical street\/strip usability\u003c\/li\u003e \u003cli\u003eBalanced intake and exhaust flow with square ports helps improve throttle response and high-RPM breathing\u003c\/li\u003e \u003cli\u003eLightweight, durable A356-T6 aluminium reduces reciprocating weight while maintaining strength under boost and high-RPM operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"TGM Performance Parts","offers":[{"title":"Default Title","offer_id":47478015787178,"sku":"AF95-2361","price":3544.9,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/7829\/4698\/files\/AF95-2361_2.jpg?v=1759285652","url":"https:\/\/tgmperformance.com.au\/products\/complete-small-block-ford-windsor-289-302-351-200cc-cnc-ported-alloy-cy-heads","provider":"TGM Performance Parts","version":"1.0","type":"link"}