{"title":"LS3 Heads","description":"\u003cdiv class=\"firstpage-custom-collection\"\u003e\n\u003cdiv class=\"content-container\"\u003e\n\u003ch2\u003eLS3 Ported Heads\u003c\/h2\u003e\n\u003cp\u003eFor enthusiasts aiming to elevate their LS-powered vehicles, upgrading to \u003cstrong\u003eLS3 heads\u003c\/strong\u003e is a transformative step. Renowned for their superior airflow and combustion efficiency, these heads are pivotal in extracting maximum performance from your engine. Whether you're building a street machine or a track dominator, \u003cstrong\u003eLS3 CNC heads\u003c\/strong\u003e offer the precision and reliability needed to achieve your goals.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cinput id=\"check_id\" type=\"checkbox\"\u003e\u003clabel for=\"check_id\"\u003e\u003c\/label\u003e\u003cdiv class=\"content\"\u003e\u003cdiv\u003e\n\u003ch2\u003eWhat Are LS3 Heads?\u003c\/h2\u003e\n\u003cp\u003eLS3 heads are aluminium cylinder heads designed for GM's LS3 engines that feature rectangular intake ports and high-flow capabilities. Their design promotes better airflow, resulting in increased horsepower and torque. When enhanced through CNC porting, these heads become \u003cstrong\u003eLS3 ported heads\u003c\/strong\u003e, offering even greater performance benefits.\u003c\/p\u003e\n\u003ch2\u003eBenefits of CNC Ported LS3 Heads\u003c\/h2\u003e\n\u003cp\u003eUpgrading to \u003cstrong\u003eCNC ported LS3 heads\u003c\/strong\u003e provides several advantages:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEnhanced Airflow: Precision CNC machining optimises intake and exhaust ports for maximum flow.\u003c\/li\u003e\n\u003cli\u003eIncreased Horsepower: Improved airflow leads to significant gains in horsepower and torque.\u003c\/li\u003e\n\u003cli\u003eConsistency: CNC porting ensures uniformity across all ports, leading to balanced engine performance.\u003c\/li\u003e\n\u003cli\u003eCompatibility: Designed to work seamlessly with other performance upgrades, including camshafts and exhaust systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePrecision and Power with CNC Ported LS3 Heads\u003c\/h2\u003eCNC ported LS3 heads are engineered for those who demand absolute precision and performance. Unlike factory heads, these undergo computer-controlled porting to fine-tune airflow and combustion efficiency. This results in superior throttle response, smoother power delivery, and increased horsepower across the rev range. \u003cp\u003eFor serious builders and tuners, this upgrade is more than a boost — it's a commitment to performance excellence. At Australia Speed, we stock only the most refined LS3 CNC heads designed to push your build further.\u003c\/p\u003e\n\u003ch2\u003eWhy Choose Australia Speed?\u003c\/h2\u003e\n\u003cp\u003eAustralia Speed stands out as a premier supplier of performance engine parts in Australia. Here's why:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExpertise: With years of experience, our team understands the intricacies of LS engines and performance upgrades.\u003c\/li\u003e\n\u003cli\u003eQuality Products: We stock only the best, ensuring our customers receive reliable and high-performing parts.\u003c\/li\u003e\n\u003cli\u003eCustomer Support: Our knowledgeable staff is always ready to assist with product selection and technical advice.\u003c\/li\u003e\n\u003cli\u003eFast Shipping: Based in Melbourne, we offer prompt delivery across Australia.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTrusted Performance Backed by Australia Speed\u003c\/h2\u003eAustralia Speed is the trusted choice for performance enthusiasts nationwide. We’re proud to deliver parts that meet the demands of high-horsepower builds. \u003cp\u003eWhen you shop with Australia Speed, you're not just buying parts — you're gaining access to years of technical experience and customer-first support. Upgrade with confidence. Upgrade with Australia Speed.\u003c\/p\u003e\n\u003ch2\u003eLS3 Heads’ Complementary Upgrades\u003c\/h2\u003e\n\u003cp\u003eTo maximise the benefits of your LS3 ported heads, consider pairing them with other high-performance components:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/australiaspeed.com.au\/cnc-shop-service\/cnc-heads\/chev\/ls2\/\"\u003eLS2 Heads\u003c\/a\u003e: Ideal for those looking to upgrade from earlier LS engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/australiaspeed.com.au\/cnc-shop-service\/cnc-heads\/chev\/ls1\/\"\u003eLS1 Heads\u003c\/a\u003e: A great option for enhancing older LS1 engines.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/australiaspeed.com.au\/ls-engine-gm-ls7-lifters-set-16\/\"\u003eLS7 Lifters\u003c\/a\u003e: Essential for maintaining valve train stability at higher RPMs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eUpgrade Your Build with LS3 Heads by Australia Speed\u003c\/h2\u003e\n\u003cp\u003eReady to unlock the full performance potential of your LS engine? Australia Speed offers premium LS3 CNC heads, LS3 ported heads, and complete CNC-ported solutions tailored for serious power gains. \u003c\/p\u003e\n\u003cp\u003eWhether you're chasing track times, dyno results, or just want your street car to deliver that extra grunt, our range of LS3 heads delivers unmatched quality and performance. With fast shipping from our Melbourne warehouse and a team of passionate experts on hand to help, there's no better time to upgrade. \u003c\/p\u003e\n\u003cp\u003eShop now and experience why Australian car enthusiasts trust us for high-quality performance parts that deliver real results, every time.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e","products":[{"product_id":"gmm-cnc-ported-l76-l77-l98-ls3-heads-pair-change-over","title":"GMM CNC Ported L76 L77 L98 LS3 Heads - Pair - \"Change Over\"","description":"\u003cp\u003e1 Pair of Complete GMM CNC Ported L76 L77 L98 LS3 Heads - 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\u003e6.0Lt Engine (Squareport)\u003c\/strong\u003e\u003cp\u003e\u003cspan\u003e-Turbo Killer Camshaft - Use \u003c\/span\u003e\u003cstrong\u003e0.003\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\u003e0.010\u003c\/strong\u003e\u003cspan\u003e Milled Head 0.020 If Urgent Super Stock, Stealth, Torque -Master Camshafts - 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 Camshaft\u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e \u003c\/span\u003e0.030\u003c\/strong\u003e\u003cspan\u003e If Requested\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e6.2Lt Engine (Squareport)\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSuper Stock, Stealth Camshaft - Use \u003c\/span\u003e\u003cstrong\u003e0.020\u003c\/strong\u003e\u003cspan\u003e Milled Head \u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eTorque Master Camshaft - Use \u003c\/span\u003e\u003cstrong\u003e0.010\u003c\/strong\u003e\u003cspan\u003e or \u003c\/span\u003e\u003cstrong\u003e0.020\u003c\/strong\u003e\u003cspan\u003e Milled Head\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eStreet Racer Camshaft - Use \u003c\/span\u003e\u003cstrong\u003e0.010\u003c\/strong\u003e\u003cspan\u003e Milled Head\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSuper Stock Camshaft Could Go \u003c\/span\u003e\u003cstrong\u003e0.030\u003c\/strong\u003e\u003cspan\u003e If Requested\u003c\/span\u003e\u003cspan\u003e\u003c\/span\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\u003eHow To Order Our CNC Heads \u003c\/p\u003e\u003cp\u003e\u003ciframe allowfullscreen=\"allowfullscreen\" height=\"314\" src=\"\/\/www.youtube.com\/embed\/4bR_yOn0P6A\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\u003cp\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.\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 off 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\" rel=\"noopener\" target=\"_blank\"\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\u003e\u003cstrong\u003eClass Race Option: \u003c\/strong\u003e\u003c\/span\u003eThese are purpose selected castings from our extensive inventory of heads within our workshop.\u003c\/p\u003e\u003cp\u003eDue to the casting process during manufacture,  some heads have more material thickness in the optimal places which allow a better porting procedure.\u003c\/p\u003e\u003cp\u003eRace Class heads also are subject to extra hand blending of ports and valve seats.\u003c\/p\u003e\u003cp\u003eSelect this if you are after the ultimate head if winning races is in your DNA\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eChange Over:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePlease choose from our options 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 + $1590.\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 $1590- 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\u003cspan\u003ePlease Deliver to 23 Reserve Road Melton 3337 with your name and number in the box!\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0727\/5793\/6305\/files\/ls3-flow-figures.jpg?v=1767911250\"\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003e\"Please note: Expected shipping of CNC Ported heads will be between 2-3 weeks from time of payment received or when change over heads are received\"\u003c\/span\u003e\u003c\/p\u003e","brand":"GM Motorsport","offers":[{"title":"Default Title","offer_id":46571682988209,"sku":"HEADS CNC SQU CHANGE OVER","price":1690.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0727\/5793\/6305\/files\/GMM_HEADS_1_EDIT__04014.1746145655.1280.1280.png?v=1767911263"},{"product_id":"brand-new-gmm-cnc-ported-ls3-head-complete-outright","title":"New GMM CNC Ported LS3 Heads Set Complete \"Outright\"","description":"\u003cp\u003e2 Complete Ls3 GMM CNC  Head - (Limited Stocks)\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\u003e8 valve stem seals\u003c\/li\u003e\n\u003cli\u003e8 retainers\u003c\/li\u003e\n\u003cli\u003e16 valve locks\u003c\/li\u003e\n\u003cli\u003e8 light weight LS3 valves\u003c\/li\u003e\n\u003cli\u003e4 intake valve seats turned on Newen cnc cutter Multiple angle variable shape\u003c\/li\u003e\n\u003cli\u003e4 Exhaust valve seats turned on Newen cnc cutter Multiple angle variable shape\u003c\/li\u003e\n\u003cli\u003eOptional increased 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\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.\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 (if you are not sure please\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"mailto:trade@gmmotorsport.com.au\" rel=\"noopener\" target=\"_blank\"\u003econtact us\u003c\/a\u003e\u003cspan\u003e \u003c\/span\u003efirst)\u003c\/p\u003e\u003cp class=\"box_spacer10\"\u003e\u003cstrong\u003eValve 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\u003cspan\u003e\u003cstrong\u003eClass Race Option: \u003c\/strong\u003e\u003c\/span\u003eThese are purpose selected castings from our extensive inventory of heads within our workshop.\u003c\/p\u003e\u003cp\u003eDue to the casting process during manufacture,  some heads have more material thickness in the optimal places which allow a better porting procedure.\u003c\/p\u003e\u003cp\u003eRace Class heads also are subject to extra hand blending of ports and valve seats.\u003c\/p\u003e\u003cp\u003eSelect this if you are after the ultimate head if winning races is in your DNA\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0727\/5793\/6305\/files\/moved-5a484ce29dbc9e6b849efa77a89640ee.jpg?v=1767911253\"\u003e\u003c\/p\u003e\u003cdiv class=\"productView\"\u003e\n\u003carticle class=\"productView-description\"\u003e\u003cdiv class=\"tabs-contents\"\u003e\u003cdiv class=\"tab-content is-active\" id=\"tab-description\"\u003e\n\u003cp\u003e\u003cspan\u003e\"Please note: Expected shipping of CNC Ported heads will be between 1-3 weeks from time of payment received or when change over heads are received\"\u003c\/span\u003e\u003c\/p\u003e\n\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\n\u003c\/div\u003e\u003c\/div\u003e\u003c\/article\u003e\u003cbr\u003e\n\u003c\/div\u003e\u003cdiv data-content-region=\"product_below_content\"\u003e \u003c\/div\u003e\u003csection class=\"toggle videoGallery\" data-video-gallery=\"\"\u003e\u003c\/section\u003e","brand":"GM Motorsport","offers":[{"title":"Default Title","offer_id":46571683053745,"sku":"HEAD CNC SQU OUTRIGHT","price":3399.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0727\/5793\/6305\/files\/GMM_HEADS_1_EDIT__73366.1675219704.1280.1280.png?v=1767911264"}],"url":"https:\/\/australiaspeed.com.au\/collections\/ls3-heads.oembed","provider":"Australia Speed","version":"1.0","type":"link"}