{"title":"LS1","description":"","products":[{"product_id":"gmm-cnc-ported-ls1-241-heads-valves-pair-change-over-free-cam","title":"GMM CNC Ported LS1 (241) Heads \u0026 Valves - Pair - \"Change Over\"","description":"\u003cp\u003e1 Pair of Complete GMM CNC Ported LS1 (241) Heads and Valves - \"Change Over\"\u003c\/p\u003e\u003cp\u003eWhat you get\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCNC ported intake and exhaust port\u003c\/li\u003e\n\u003cli\u003eultra sonic process\u003c\/li\u003e\n\u003cli\u003e16 valves ground\u003c\/li\u003e\n\u003cli\u003e8 intake valve seats turned on Newen cnc cutter Multiple angle variable shape\u003c\/li\u003e\n\u003cli\u003e8 Exhaust valve seats turned on Newen cnc cutter Multiple angle variable shape\u003c\/li\u003e\n\u003cli\u003eincreased compression ratio with deck face machined. \u003c\/li\u003e\n\u003c\/ul\u003e\u003cstrong\u003e5.7Lt Engine (Cathedral)\u003c\/strong\u003e\u003cp\u003e\u003cspan\u003e-Turbo Killer Camshaft - Use \u003c\/span\u003e\u003cstrong\u003e0.010\u003c\/strong\u003e\u003cspan\u003e Milled Head\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e-Street Racer Camshaft - Use \u003c\/span\u003e\u003cstrong\u003e0.020\u003c\/strong\u003e\u003cspan\u003e Milled Head\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e-Super Stock, Stealth, Torque Master Camshafts - Use \u003c\/span\u003e\u003cstrong\u003e0.030\u003c\/strong\u003e\u003cspan\u003e Milled Head\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e-Super Stock Camshaft \u003c\/span\u003e\u003cstrong\u003e0.040\u003c\/strong\u003e\u003cspan\u003e If Requested\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e \u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/www.gmmotorsport.info\/cncheads\"\u003eClick here for more information on our CNC heads\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ciframe src=\"\/\/www.youtube.com\/embed\/4bR_yOn0P6A\" width=\"560\" height=\"314\" allowfullscreen=\"allowfullscreen\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\u003cp\u003e\u003ciframe src=\"\/\/www.youtube.com\/embed\/Qz1K8xyB8z0?t=167s\" width=\"560\" height=\"314\" allowfullscreen=\"allowfullscreen\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\u003cp\u003eIf you are looking for that extra edge or, more precisely, added power, then CNC technology will give you the results you need.\u003c\/p\u003e\u003cp\u003eIn fact, the cylinder head is one of the most, if not the most, important facets of engine horsepower.\u003c\/p\u003e\u003cp\u003eGMM Racing Heads have been supplying cylinder heads to major race teams \u003c\/p\u003e\u003cp\u003eThey have led the industry by providing superior performance cylinder heads to a broad cross-section of the racing world.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp class=\"box_spacer10\"\u003e\u003cspan\u003e\u003cstrong\u003eUpgrade Options\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp class=\"box_spacer10\"\u003e\u003cstrong\u003eDecking:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePlease choose how much you want decked of the head = $0.00 no extra charge - ( if you are not sure please\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"mailto:trade@gmmotorsport.com.au\" target=\"_blank\" rel=\"noopener\"\u003econtact us\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003efirst)\u003c\/p\u003e\u003cp class=\"box_spacer10\"\u003e\u003cstrong\u003eAdd Valve Springs:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePlease advise if you would like valve springs added to your order\u003c\/p\u003e\u003cp class=\"box_spacer10\"\u003e\u003cstrong\u003eValve Stem Seals:\u003c\/strong\u003e\u003cspan\u003e Please advise if you would like valve stem seals added to your order\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eChange Over:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePlease choose from our change over or outright option below\u003c\/p\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eChange Over: \u003c\/strong\u003e\u003cspan\u003e\u003c\/span\u003eYou can bring your heads in to store and direct swap for a finished set, or send us your heads first and we will send you a finished set back. Heads must have valves, retainers and locks. \u003cspan\u003eHeads must be undamaged, unmodified \u0026amp; in a satisfactory clean condition. Charges will apply for heads presented in a highly dirty state or minor repairs. Example (broken header bolts).\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePurchase Outright:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYou can purchase a set of heads outright and keep your own + $1299.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCore Holding Deposit:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eYou can pay a core holding deposit of $1299- and have this refunded to you when you send your heads back to us - (\u003cspan\u003eYou must send us your heads no longer than 2 weeks after receiving the ones we send you.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003e\"Please note: Expected shipping of CNC Ported heads will be between 1-2 weeks from time of payment received or when change over heads are received\"\u003c\/p\u003e\u003cp\u003e\u003cspan\u003ePlease Deliver to 23 Reserve Road Melton 3337 with your name and number in the box!\u003c\/span\u003e\u003c\/p\u003e","brand":"GM Motorsport","offers":[{"title":"Default Title","offer_id":46571683119281,"sku":"GMM CNC LS1 241 CASTING","price":1690.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0727\/5793\/6305\/files\/CNCCylinderheads__52656.1746145691.1280.1280.jpg?v=1767911266"},{"product_id":"gmm-cnc-ported-ls1-241-casting-heads-pair-outright","title":"GMM CNC Ported LS1 (241 casting) Heads - Pair - \"Outright\"","description":"\u003cp\u003e1 Pair of Complete GMM CNC Ported LS1 (241 catsing) Heads - \"Outright\"\u003c\/p\u003e\u003cp\u003eWhat you get\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e \u003c\/li\u003e\n\u003cli\u003e550 GM Vave springs\u003c\/li\u003e\n\u003cli\u003eRefurbished 241 Cylinder Head castings\u003c\/li\u003e\n\u003cli\u003eCNC ported intake and exhaust ports\u003c\/li\u003e\n\u003cli\u003eultra sonic process\u003c\/li\u003e\n\u003cli\u003e16 valves ground\u003c\/li\u003e\n\u003cli\u003e8 intake valve seats turned on Newen cnc cutter Multiple angle variable shape\u003c\/li\u003e\n\u003cli\u003e8 Exhaust valve seats turned on Newen cnc cutter Multiple angle variable shape\u003c\/li\u003e\n\u003cli\u003eincreased compression ratio with deck face machined. \u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003ca href=\"https:\/\/www.gmmotorsport.info\/cncheads\"\u003eClick here for more information on our CNC heads\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ciframe src=\"\/\/www.youtube.com\/embed\/Qz1K8xyB8z0?t=167s\" width=\"560\" height=\"314\" allowfullscreen=\"allowfullscreen\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\u003cp\u003eIf you are looking for that extra edge or, more precisely, added power, then CNC technology will give you the results you need.\u003c\/p\u003e\u003cp\u003eIn fact, the cylinder head is one of the most, if not the most, important facets of engine horsepower.\u003c\/p\u003e\u003cp\u003eGMM Racing Heads have been supplying cylinder heads to major race teams \u003c\/p\u003e\u003cp\u003eThey have led the industry by providing superior performance cylinder heads to a broad cross-section of the racing world.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp class=\"box_spacer10\"\u003e\u003cspan\u003e\u003cstrong\u003eUpgrade Options\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp class=\"box_spacer10\"\u003e\u003cstrong\u003eDecking:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePlease choose how much you want decked of the head = $0.00 no extra charge - ( if you are not sure please\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"mailto:trade@gmmotorsport.com.au\" target=\"_blank\" rel=\"noopener\"\u003econtact us\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003efirst)\u003c\/p\u003e\u003cp class=\"box_spacer10\"\u003e\u003cstrong\u003ePSi Valve Springs:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePlease advise if you would like valve springs added to your order\u003c\/p\u003e\u003cp class=\"box_spacer10\"\u003e\u003cstrong\u003eValve Stem Seals:\u003c\/strong\u003e\u003cspan\u003e Please advise if you would like valve stem seals added to your order\u003c\/span\u003e\u003c\/p\u003e\u003cp class=\"box_spacer10\"\u003e\u003cspan\u003eCan be shipped within 48HRS of payment being received\u003c\/span\u003e\u003c\/p\u003e\u003cp class=\"box_spacer10\"\u003e\u003cspan\u003ePlease Deliver to 23 Reserve Road Melton 3337 with your name and number in the box!\u003c\/span\u003e\u003c\/p\u003e","brand":"GM Motorsport","offers":[{"title":"Default Title","offer_id":46571683184817,"sku":"GMM CNC LS1 241 CASTING OUTRIGHT","price":3499.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0727\/5793\/6305\/files\/CNCCylinderheads__36912.1593528849.1280.1280.jpg?v=1767911268"}],"url":"https:\/\/australiaspeed.com.au\/collections\/ls1-1.oembed","provider":"Australia Speed","version":"1.0","type":"link"}