{"product_id":"yella-terra-holden-6-blue-black-12-port-alloy-head-72cc-assembled-acha-33c72","title":"Yella Terra Holden 6 Blue\/Black 12-Port Alloy Cylinder Head — 72cc Assembled — ACHA 33C72","description":"\u003cp\u003eACHA 33C72 is Yella Terra’s assembled large-chamber alloy 12-port cylinder head for compatible Holden Blue\/Black straight-six applications requiring a lower-compression chamber arrangement.\u003c\/p\u003e\u003ch3\u003eAssembled 72 cc specification\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e72 cc combustion chambers.\u003c\/li\u003e\n\u003cli\u003e12-port Holden inline-six architecture.\u003c\/li\u003e\n\u003cli\u003eHeat-treated 356-T6 aluminium casting.\u003c\/li\u003e\n\u003cli\u003eSupplied assembled.\u003c\/li\u003e\n\u003cli\u003eRevised port and chamber design derived from Yella Terra’s performance alloy-head program.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eEngine combination:\u003c\/strong\u003e The final compression ratio depends on bore, stroke, piston crown\/deck height and gasket volume. Verify the complete combination before assembly.\u003c\/p\u003e\u003ch2\u003eSupplier\u003c\/h2\u003e\u003cp\u003eYella Terra\u003c\/p\u003e\u003ch2\u003eProduct System\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eEngine Parts\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSupplier Part Number\u003c\/h2\u003e\u003cp\u003eACHA 33C72\u003c\/p\u003e\u003ch2\u003eBuilt by Boost \u0026amp; Tune Support\u003c\/h2\u003e\u003cp\u003eBBT can assist with fitment review, installation, supporting modifications, configuration and calibration requirements where applicable.\u003c\/p\u003e","brand":"Yella Terra","offers":[{"title":"Default Title","offer_id":43817420161091,"sku":"ACHA 33C72","price":3650.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0703\/0659\/4883\/files\/6cyl_assem__60740.1423637940.webp?v=1789174869","url":"https:\/\/builtbyboostandtune.com.au\/products\/yella-terra-holden-6-blue-black-12-port-alloy-head-72cc-assembled-acha-33c72","provider":"BUILT BY BOOST AND TUNE","version":"1.0","type":"link"}