{"product_id":"yella-terra-holden-6-road-racer-48cc-assembled-alloy-head-acha-33c48","title":"Yella Terra Holden 6 Road Racer 12-Port Alloy Cylinder Head — 48cc Assembled — ACHA 33C48","description":"\u003cp\u003eACHA 33C48 is the assembled high-compression Road Racer version of Yella Terra’s alloy Holden inline-six 12-port head. Its 48 cc closed chamber is aimed at naturally aspirated performance combinations where the engine builder is deliberately targeting increased compression.\u003c\/p\u003e\u003ch3\u003eRoad Racer assembled head\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e48 cc closed combustion chambers.\u003c\/li\u003e\n\u003cli\u003eAssembled valvetrain configuration.\u003c\/li\u003e\n\u003cli\u003e356-T6 alloy 12-port architecture.\u003c\/li\u003e\n\u003cli\u003eDesigned around Holden Blue\/Black 202 applications.\u003c\/li\u003e\n\u003cli\u003eCan be adapted to earlier Red 149–202 engines with the required block changes.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompression check:\u003c\/strong\u003e This is a high-compression chamber. Calculate static and dynamic compression and verify piston-to-valve\/chamber clearance 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 33C48\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":43817423536195,"sku":"ACHA 33C48","price":3550.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0703\/0659\/4883\/files\/IMG_7733_2__29121.1507268304.jpg?v=1789174888","url":"https:\/\/builtbyboostandtune.com.au\/products\/yella-terra-holden-6-road-racer-48cc-assembled-alloy-head-acha-33c48","provider":"BUILT BY BOOST AND TUNE","version":"1.0","type":"link"}