{"product_id":"yella-terra-holden-6-blue-black-12-port-alloy-head-56cc-assembled-acha-33c56","title":"Yella Terra Holden 6 Blue\/Black 12-Port Alloy Cylinder Head — 56cc Assembled — ACHA 33C56","description":"\u003cp\u003eYella Terra’s assembled 56 cc alloy 12-port cylinder head is a performance replacement for compatible Holden Blue\/Black straight-six combinations. The casting uses heat-treated 356-T6 aluminium and a revised port\/chamber layout aimed at improved airflow, cooling and weight reduction compared with the original iron head.\u003c\/p\u003e\u003ch3\u003eAssembled 56 cc specification\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e56 cc combustion chambers for standard\/high-compression-style combinations.\u003c\/li\u003e\n\u003cli\u003e12-port Holden inline-six layout.\u003c\/li\u003e\n\u003cli\u003e356-T6 aluminium construction.\u003c\/li\u003e\n\u003cli\u003eSupplied assembled with valvetrain hardware installed by Yella Terra.\u003c\/li\u003e\n\u003cli\u003eYella Terra states the revised design flows more than 30% better than the original head and supports approximately 240 hp in suitable combinations.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e Confirm block family, bore, piston\/chamber clearance, compression ratio, manifold, valvetrain geometry and cooling arrangement with the engine builder 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 33C56\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":43817418817603,"sku":"ACHA 33C56","price":3400.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0703\/0659\/4883\/files\/6cyl_assem__84284.1423637344.jpg?v=1789174863","url":"https:\/\/builtbyboostandtune.com.au\/products\/yella-terra-holden-6-blue-black-12-port-alloy-head-56cc-assembled-acha-33c56","provider":"BUILT BY BOOST AND TUNE","version":"1.0","type":"link"}